Sythetic Flashpup Adventure Started

[mackeral5]

Sweet project, perfectly executed.

[Rallyshark]

Thanks Mike! I'm not done yet, but it is moving along.  I'm really anxious to see what I can do with that FX slug liner! 

[mackeral5]

I hear you on the slug liner.  I really like and appreciate the compact, lightweight powerhouses such as this one....on my p15 I found it became difficult to shoot accurately when tuned in the high 50fpe range.  With the full length MRod barrel it has a lot of power potential but in the end I realized I didn't need a bunch of power for my intended uses.  Ultimately I settled on a very mild 45fpe tune for the P15.  it has similar air capacity to an Mrod, but rated for 250bar.  It gets right around 45-50 shots with this tune.

I really like the looks of your little pup with the 15" barrel, but I do understand the quest for more power.

[Rallyshark]

I hear you on the slug liner.  I really like and appreciate the compact, lightweight powerhouses such as this one....on my p15 I found it became difficult to shoot accurately when tuned in the high 50fpe range.  With the full length MRod barrel it has a lot of power potential but in the end I realized I didn't need a bunch of power for my intended uses.  Ultimately I settled on a very mild 45fpe tune for the P15.  it has similar air capacity to an Mrod, but rated for 250bar.  It gets right around 45-50 shots with this tune.

I really like the looks of your little pup with the 15" barrel, but I do understand the quest for more power.

My goal is for this gun to fill the 35-60fpe range with slugs.  I already have the .177, which does quite well on the lower to mid power stuff.  With the much lower price of the NSA slugs now, I see it as a good thing to tune this gun for, since it can easily make that power range.  Of course, it could all turn out a bust, and I end up keeping the 15" barrel on it   The modding is as much fun as the shooting for me though. 

[VaporTrail]

Donny...if you ever get the SFP to where you like it and you need another project, lemme know. I have a newer Bullboss that could benefit from someone who actually knows what they're doing with it. 

Simply amazing that you could get it to the same power level as the Boss in such a short amount of time! I almost pulled the trigger on a refurb Wood Flash on Hatsan's site last week, but I proudly held myself back.

Now it makes me wonder if I should have jumped on that deal. 

[Rallyshark]

I got the new slug liner barrel finished tonight!  It ended up being right at 24" with the brass piece that fits into the breech of the gun.  I took the barrel port farther than I would on a normal barrel, since this one is intended for slugs and heavy pellets(.205 x .196).  The extra length combined with the slightly larger than normal port really took the lowly SFP up a notch.  It was dark, so no accuracy testing yet, but I did get a short little chrony session in.  I cranked up the HS and grabbed some of the older NSA 30 grain slugs I had left over.  The first three shots were 1014, 1009, and 1017 fps!  That is slightly more than I was able to get out of my highly modded Bullboss with the same slugs.  After that, I turned down the HS to get them around 900 fps for when I get to the accuracy testing.  I'm very stoked about the power the little Flash pup was able to put down, and I'm sure it would be over 70fpe with the 34 grain beasts   She's got the juice to sling any .22 slug I want now.

Basically, I took an FX .22 Slug liner A(600mm), and added a brass thimble to the breech end, and sleeved it with two thick tubes of carbon fiber.  I used two tubes of pultruded carbon fiber around the liner, and that sucker is pretty darn stiff!  I didn't really want to use pultruded CF, but it fit the bill for not having to stack too many CF sleeves to get the diameter I wanted.  Pultruded has all the fibers running the length of the tube, so it is extremely stiff and resistant to barrel flex.  I topped it off with an aluminum LDC adapter that I made to keep the weight down.  The cool thing is this barrel is actually lighter than the 15" steel barrel I made!  It balances really well too.  If the accuracy is there with slugs, this will be one heck of a bargain slug slinger!  Even with the 24" barrel, and an 8" LDC on it, it is still only 39".  Here's some pictures of the barrel below that I took.  I will try and add a picture of the gun later on, and will update with the accuracy results!

[Thane]

That is a good looking barrel, looking forward to seeing the groups!

[Rallyshark]

That is a good looking barrel, looking forward to seeing the groups!

Well, unfortunately, it didn't like a single one of the .217 slugs   I don't know if it is because I got the leade in wrong, or if it is wanting some .218 instead?  I ordered some .218 to test that should be here next week hopefully.  On the bright side, it liked the JSB Monsters (old and new) great.  It was one ragged hole with them, and with Barracuda Match too.  They even did well approaching 1000 fps. 

I just did some testing with the 34 grain Beasts, and holy cow!  At max power, it hit 989 fps for 73.75 fpe    I backed it down and was able to get a solid 10 shot power tune with them.  It averaged 917 fps with an ES 27 !  A 10 shot 63 fpe tune on a gun with a 165cc air cylinder ain't nothing to laugh at for sure.  If it isn't raining tomorrow, I should be able to test the accuracy with the Beasts.  I'm thinking it will probably do pretty well.  Remember, this gun is a hunter, so I'm not after 30 shots with it.  That is especially true for any game I'd be hunting at that power level(oink). 

Even if this barrel turns out not liking the .218 slugs, it won't be a total bust, since it does like pellets   

[Rallyshark]

I got to put a few Beasts on target today, and the gun does like them!  I only tested at 30 yards, but it was very windy.  I didn't test below 900 fps, but they did great anywhere from 900-950 fps.  It was kind funny feeling my little air gun slide back just a bit when it shot,lol.  I wasn't all that focused, because it was a quick test, but there wasn't a single flyer in all of the shots I did. Below is a 5 shot group at the previously mentioned 915-920 fps with a Beast laying on top.  I actually, pulled one the shots a little.  This really makes me think there may be some hope for the .218 slugs....

[VaporTrail]

She's a lightweight accurate hammer! 

That's insane!

[Rallyshark]

She's a lightweight accurate hammer! 

That's insane!

Yessir, she's a little hammer for sure!  I plan on taking her on an adventure this weekend, but only as a backup to my mini hammer .177 shooting 21 grain NSA slugs.  It should be interesting...  I'm still waiting on a piggy update from you   I just noticed that "Rally" version Bullboss in your sig, haha, nice! 

[Thane]

Just shot some FX Hybrids (save the drama for your mama) and they are amazing out of the .22 Flash Pup which has a tight choke.
I was only pushing them at 800FPS and making very tight 5 shot groups at 25 yds, well under 1/4" one under 1/8" center to center.
2 groups on the right, left group were JSB Heavies, on a 1" grid. I'm looking forward to stretching it out to 50 and 75 yds.

Would love to see what you could drive these at.

The AT44 with mild choke, not so much.

[Rallyshark]

Just shot some FX Hybrids (save the drama for your mama) and they are amazing out of the .22 Flash Pup which has a tight choke.
I was only pushing them at 800FPS and making very tight 5 shot groups at 25 yds, well under 1/4" one under 1/8" center to center.
2 groups on the right, left group were JSB Heavies, on a 1" grid. I'm looking forward to stretching it out to 50 and 75 yds.

Would love to see what you could drive these at.

The AT44 with mild choke, not so much.

That's great that those are working that well for you!  The price is what keeps me away from the FX slugs.  I mean, I can get heavy pellets with more for that price, and 300-350 slugs from NSA for close to the same price.  The other issue I have is weight, at least for this gun.  I built it to be able make power(when needed), and to have the ability to deal with larger critters.  The fast expanding 22 grain FX slugs, won't be that good for tough critters that need good penetration I don't think.  I do think they would be excellent for every day hunting though.  I bet they would be very effective for tree rats, rabbits, and birds!  The other want for slugs is long range fun, but that cost comes back into the picture.  I'm not knocking them at all, they just float just outside the area I want them to fill for my situation.  I still have the .218 sample pack from NSA to test, since the .217s were a bust.  Oh, and there's the H&Ns that are out now.  I hope to test them soon as well  

On a side note, the new barrel absolutely loves the 34 grain Beasts!  I got to do some testing at 50 yards this weekend, when sighting in for a hunt, and the groups look just like the ones from 30 yards.  One ragged hole, and some serious thump too.  They are the most accurate ammo in this gun, with the redesigned Monsters a very close second. 

[VaporTrail]

She's a lightweight accurate hammer! 

That's insane!

Yessir, she's a little hammer for sure!  I plan on taking her on an adventure this weekend, but only as a backup to my mini hammer .177 shooting 21 grain NSA slugs.  It should be interesting...  I'm still waiting on a piggy update from you   I just noticed that "Rally" version Bullboss in your sig, haha, nice!

Very nice! How did the adventure go? I had a short one, but no one came out to play. Well, aside from the target box, but that was about it. Miscellaneous frogs, toads and crabs rummaging about, but they weren't part of the target menu.

And yes...the "Rally Version" puts a nice touch on it. 

[Rallyshark]

It was pretty much the same for me.  Plenty of critters, but not the ones I was look for,lol. 

[darkcharisma]

Well, PA has a 20% off of hatsans so i got the synthetic on the way here. cheaper than when they had $50 off. in .25 it should be more or less of the power i wanted. oh ya

[Rallyshark]

Well, PA has a 20% off of hatsans so i got the synthetic on the way here. cheaper than when they had $50 off. in .25 it should be more or less of the power i wanted. oh ya

That is awesome!  Knowing how you like to "tinker", just as I do, you can probably turn the .25 into a monster, if you wanted   Still, they are a dang solid little thumper right out of the box.  If you get froggy about tuning it, just shoot me a pm, and I'll answer anything you want to know.  Let us know how it does when you get to play with it!

[darkcharisma]

hey thanks man. i usually can figure things out on my own but i do rather like asking for an easy way out. 

[Rallyshark]

hey thanks man. i usually can figure things out on my own but i do rather like asking for an easy way out. 

Hey, you could always come up with something I haven't thought about too!  That's the great part about different people doing this.  The biggest benefit of these guns is the simplicity, so the tuning is pretty cut and dry.  At this point, I think the biggest improvements that could be had are larger air reservoir with a higher fill pressure, and regulation with a big plenum

[darkcharisma]

the only thing you and i haven't thought about is  fitting a balanced valve. wait...i just thought about it. lol.
yes regulator and bottle for more consistent shot counts are old news. the plenum if tube is cut forward of the barrel band should yield closer to 50-70cc. thats plenty!