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All Springer/NP/PCP Air Gun Discussion General => Air Gun Gate => Topic started by: Lt. Dan on September 20, 2020, 03:51:40 PM

Title: Synthetic stock, how do you remove hollow sound?
Post by: Lt. Dan on September 20, 2020, 03:51:40 PM
Okay guys and gals, I have a question for you. Most who have read my posts know that I prefer wood stocks over plastic ones but occasionally a synthetic stock is all that is available or offered.
I just recently received a Beeman Qb78s .177.
It is scary accurate with dime size groups at 25 yards. My gripe with this little rifle is the hollow sound the stock makes. I know I've read on here where some of you have filled the stock with ______________? Dang I can't remember what you filled it with. Can you give me some suggestions please?
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: Fate on September 20, 2020, 04:13:42 PM
You have other things to think about that factor into the answer to your question.

I've filled synthetic stocks with duct seal and aluminum bedding bars... but then, I was looking more for accuracy in a gun used mostly on a bench or a bipod, but my methods added weight, a good thing to me.

Others, merely wanting the hollow sound gone and retain the lightness, have used several fillers... from rags to expanding insulation foam.

It might be good to reveal your intentions and needs, so when others chime in they can respond with those in mind.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: Blowpipe Sam on September 20, 2020, 04:37:12 PM
I'm assuming that the butt plate is removeable.  I've tried different stuff but the easiest and cheapest thing that I have found is to stuff the hollow space with empty plastic shopping bags.  Unlike sticky stuff the bags can be removed if you decide you don't like them.  And believe me having a handy reservoir of plastic bags along when you are out in the woods can be nice.  Rags can get wet and mold.  Foam insulation is a pain to work with and it's permanent.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: Lt. Dan on September 20, 2020, 04:57:14 PM
You have other things to think about that factor into the answer to your question.

I've filled synthetic stocks with duct seal and aluminum bedding bars... but then, I was looking more for accuracy in a gun used mostly on a bench or a bipod, but my methods added weight, a good thing to me.

Others, merely wanting the hollow sound gone and retain the lightness, have used several fillers... from rags to expanding insulation foam.

It might be good to reveal your intentions and needs, so when others chime in they can respond with those in mind.
Thanks Jeff, I should have thought to add that. My intentions are only to remove Hollow sound  not add weight.  I'm shooting with bipods or off a tripod.  Range is <30 yds, and just plinking or shooting spinners.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: Lt. Dan on September 20, 2020, 05:02:16 PM
I'm assuming that the butt plate is removeable.  I've tried different stuff but the easiest and cheapest thing that I have found is to stuff the hollow space with empty plastic shopping bags.  Unlike sticky stuff the bags can be removed if you decide you don't like them.  And believe me having a handy reservoir of plastic bags along when you are out in the woods can be nice.  Rags can get wet and mold.  Foam insulation is a pain to work with and it's permanent.
Just before posting I had added rags, I hadn't thought about them getting wet....hmm.
I hadn't thought about using plastic bags.   I don't EVER want to use spray foam insulation again. Clean up and mess is a PITA.


I thought about putting some styrofoam in a blender and then pouring and packing it tight, just don't know it that has been tried and it didn't work.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: mobilehomer on September 20, 2020, 05:44:28 PM
Upholstery foam is also good. Cut it large and stuff it.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: Lt. Dan on September 20, 2020, 05:51:51 PM
Upholstery foam is also good. Cut it large and stuff it.
Another cool idea.  I think I might have some of that in the attic. Will it draw (wick) moisture in? I mean like a sponge would?
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: 19Sheridan57 on September 20, 2020, 06:02:18 PM
  Get a jar of plumber’s putty( or play- dough ) put some into a few plastic freezer bags , & stuff those into the stock. The freezer bags let you remove or add more, without a mess. One pound  makes a big difference.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: cosmic on September 20, 2020, 06:40:46 PM
 Spay cooking spray into the stock and then use Low expanding foam to fill it..
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: mobilehomer on September 20, 2020, 08:08:43 PM
Upholstery foam is also good. Cut it large and stuff it.
Another cool idea.  I think I might have some of that in the attic. Will it draw (wick) moisture in? I mean like a sponge would?

Mine hasn't as far as I know. Haven't checked since I installed a few years ago. You could put it in some storage bags to make sure.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: Allen Rice on September 20, 2020, 11:51:19 PM
I have used the construction foam product, "Great Stuff" with excellent results.  First, remove the butt-plate and drill a hole just large enough to fit the fill nozzle provided with the product.  Then, drill a small hole on the bottom at the far end of the hollow stock to allow air to escape.  Now, discharge the foam through the fill hole - continue until the foam just starts to emerge out the air hole.  allow the foam to cure, cut away any excess that escapes through the holes you drilled, and reassemble the butt-plate.  Permanently fixed - No more hollow sound. 

Good Luck,
ar
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: Blowpipe Sam on September 21, 2020, 12:02:34 AM
I have used the construction foam product, "Great Stuff" with excellent results.  First, remove the butt-plate and drill a hole just large enough to fit the fill nozzle provided with the product.  Then, drill a small hole on the bottom at the far end of the hollow stock to allow air to escape.  Now, discharge the foam through the fill hole - continue until the foam just starts to emerge out the air hole.  allow the foam to cure, cut away any excess that escapes through the holes you drilled, and reassemble the butt-plate.  Permanently fixed - No more hollow sound. 

Good Luck,
ar
I'll add a suggestion that makes cleanup a little easier.  Stick a patch of duct tape or a double layer of painter's tape a couple of inches square on the stock where you are going to drill your holes.  Drill through the tape.  Any foam that escapes will stick to the tape and not your stock.  Pull the tape off and the foam goes with it.  Then just trim any that sticks out of the hole. I neglected to do this last time and now I have gummy looking blemishes on my Winchester 1100 stock. :(
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: A.K.A. Tommy Boy on September 21, 2020, 01:42:11 PM
Hi Carter.

Say...Steve-P 52 uses the foam packing that comes with an order of pellets (like the foam that P.A uses)... to fill the rear cavities of his composite stocked rifles.
I have one of his Hatsan Edge rifle stocks on my Hatsan Striker and it works Great....It's Light Weight.... &... It's Free Too !


Best Wishes - Tom
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: Ribbonstone on September 21, 2020, 01:51:10 PM
Another vote for expanding foam....but it's a PIA if you forget to plug unexpected exits or over fill from the (removed) butt plate.

trick is finding the hole...plughging them can be as easy as pounding balls balls of Al. foil into the exits.

Does deaden the hollow sound nicely.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: superchikn on September 21, 2020, 03:36:56 PM
There is also latex stick a foam.  Water cleanup is good! 

https://www.homedepot.com/p/DAP-Daptex-Plus-12-oz-White-Window-and-Door-Foam-Sealant-18836/100357216 (https://www.homedepot.com/p/DAP-Daptex-Plus-12-oz-White-Window-and-Door-Foam-Sealant-18836/100357216)
I have used this several different times.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: cosmic on September 21, 2020, 05:48:05 PM
That is what I said.. Low expanding foam...
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: Lt. Dan on September 21, 2020, 06:14:42 PM
Tom Steve-P 52 emailed me yesterday and told me he uses the foam packing that comes with an order of pellets to fill the rear cavities of his composite stocked rifles and he really likes it. That's what I'm going to try first. It seems easy and quick, and I an abundance of it. It's easy to cut and trim and will be simple to pack the cavity with.

I have abandoned the latex foam idea either.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: mr007s on September 21, 2020, 06:44:08 PM
My first air rifle was a Gamo whisper with a hollow stock. I purchased a cheap pillow made with memory foam. The foam was stuffed tight in the stock and worked well for me.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: Lt. Dan on September 21, 2020, 07:52:39 PM
Tom Steve-P 52 emailed me yesterday and told me he uses the foam packing that comes with an order of pellets to fill the rear cavities of his composite stocked rifles and he really likes it. That's what I'm going to try first. It seems easy and quick, and I an abundance of it. It's easy to cut and trim and will be simple to pack the cavity with.

I have haven't abandoned the latex foam idea either.
Sorry, I  meant to say " I haven't abandoned the latex foam idea either."
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: maraudinglizard on September 21, 2020, 08:17:56 PM
I used hot melt glue in my Benjamin Trail pistol, solve the noise problem. It didn't add that much weight to either. As for my other hollow plastic stocks, I just live with the noise, most are for plinking anyway.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: Bentong on September 21, 2020, 10:30:22 PM
I stuffed my QB78S with bubble wrap, worked for me  👍🏽.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: Lt. Dan on September 21, 2020, 11:40:52 PM
I stuffed my QB78S with bubble wrap, worked for me  👍🏽.
Bubble wrap,  hmm. That's an idea but I enjoy popping them to much. Lol
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: Scrambler82 on September 22, 2020, 12:04:42 AM
From a Novice point of view... I did my Bone-Collector,
I thought about my Jeep and what I did to that to reduce the road noise.
I took some of the Noise Cancelling Mat I used for the Jeep, called Fat Mat, and stuck a few smaller pieces to the inside fo the stock, then I too some of the speaker Cotton (not the right name) but the stuff I used in my vehicle speakers, added that to the stock, not a stuffed condition but I filled the area.

When I was done it sounded quieter to me, am I happy with it... yes !
 
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: BillK on September 22, 2020, 01:11:31 AM
Spay cooking spray into the stock and then use Low expanding foam to fill it..

Having tried other remedies I'm going to try/use this as it makes good sense to me and will not make the stock too much heavier.  Also can be easily trimmed to fit.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: AirGunner on September 22, 2020, 11:35:36 AM
I have used duct seal in three stocks. The weight also helped with the gun's balance as they were barrel heavy.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: Missed-Em on September 22, 2020, 12:49:54 PM
I just tried the "stuff with grocery bags" suggestion and it took about 5 minutes and seemed to dull the sound quite a bit. Well worth the try.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: Ribbonstone on September 22, 2020, 01:05:51 PM
 Tell you what...have one hollow butt/plastic stock I haven't done anything to. Hollow sound from a stock impact doesn't really bother me,but am wondering if jam-packing shipping "peanuts" wouldn't do it.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: lefteyeshot on September 22, 2020, 04:44:23 PM
I have a AR 2078 T.H. and a AR 2078B side lever. I'd order a wood QB78 Delux stock and barrel band from the guy on the other channel we're not supposed to speak of. $55.

You can google: wood stock QB78 air rifle.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: Lt. Dan on September 23, 2020, 07:02:49 AM
I have a AR 2078 T.H. and a AR 2078B side lever. I'd order a wood QB78 Delux stock and barrel band from the guy on the other channel we're not supposed to speak of. $55.

You can google: wood stock QB78 air rifle.

I thought about that. I didn't pay but $65 for the rifle and I  can't bring myself to spend the $55 + $16 + shipping cost. But I  did go to that unspeakable place and look at it. Thanks for giving me that info in case I come into some extra money.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: avator on September 23, 2020, 08:26:07 AM
I use chopped up carpet pad if I don't want to add weight. If weight is not and issue I use silicone caulk.
If your gun is exposed to enough wetness to get the carpet pad wet then you're gonna have bigger issues than mold... ???
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: Lt. Dan on September 23, 2020, 11:35:11 AM
By son just received a water hose reel from Amazon.  I  was there when he unpacked it and it had a 12" x 18" x 5/8" sheet of closed cell foam. I cut strips and used a 3/8" stainless steel rod to pack them in tight. It definitely doesn't sound hollow anymore but it doesn't sound solid either. I maybe leaning towards plumber's putty,  I bet its dense enough to sound solid.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: Blowpipe Sam on September 23, 2020, 03:12:11 PM
I use chopped up carpet pad if I don't want to add weight. If weight is not and issue I use silicone caulk.
If your gun is exposed to enough wetness to get the carpet pad wet then you're gonna have bigger issues than mold... ???
I resemble that remark! ;D  Yeah it's wet down here in the swamp.  I sometimes wear chest waders to deer hunt.  I've had to wade through knee deep water while hunting on many occasions.  With that said I really am not a fan of synthetic stocks.  I  don't like the look, feel, or sound of them.  I've never had a problem with my wood stocked rifles and I tote them every where.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: 19Sheridan57 on September 23, 2020, 03:25:55 PM
  The plumbers putty has tamed down some Hatsans that are very powerful, but have a huge amount of TWANGE , too !!
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: avator on September 23, 2020, 03:45:49 PM
I use silicone caulk in Daisy 880 guns. It balances them out really well and the heft is enough to make them feel less toy like.
Title: Re: Synthetic stock, how do you remove hollow sound?
Post by: Lt. Dan on September 23, 2020, 04:41:58 PM
  The plumbers putty has tamed down some Hatsans that are very powerful, but have a huge amount of TWANGE , too !!
Thanks Steve for your input. 
Dan