Is The Mac1 Steroid Kit, The Same as Having Tim Do The Work, What Velocity ?



Author Topic: Is The Mac1 Steroid Kit, The Same as Having Tim Do The Work, What Velocity ?  (Read 595 times))

Offline wll2506

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When my Benjamin 392 arrives I may do the Steroid thing, but was wondering ..... If I buy Tim's Steroid Kit will the gun function as if Tim did it ?

I have all the equipment to do the work myself, but was wondering if Tim does other stuff like bore out valves or ?  .....  I don't know ?


My other question is on velocity increase ? With a "Do It Yourself" Steroid mod do you guys in the know think I could get 750-775 fps using JSB Jumbo Heavies, (18.1gr) or about 24fpe at the muzzle ? If not, what realistic fpe are you guys that have the steroid conversion getting ?

Thanks guys as always.

wll
  • Lancaster, Ca.

Offline Tack Driver 10

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I don't own or have ever shot a 392 but here's some that have:

https://www.tapatalk.com/groups/thegreencrosmanforum/steroided-t39856.html#p238222

Really depends on how many pumps you are willing to make.
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Offline Psipumper

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I see you are all in on your new 392. They can make 24 fpe and the steroid parts would be a good start if you modify it. Your results will vary . Maybe 21 fpe . I donít know what work Tim does in the conversion but I donít think any boring or drastic changes are done to the valve.
« Last Edit: February 14, 2019, 09:23:47 PM by Psipumper »
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Offline RBQChicken

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You'd have to ask Tim to know for sure, but I remember a post by him once saying that you may see guns for sale that claim to be "steroided" because they have some of his steroid parts but if the work wasn't done by him then it's not steroided.
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Offline wll2506

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You'd have to ask Tim to know for sure, but I remember a post by him once saying that you may see guns for sale that claim to be "steroided" because they have some of his steroid parts but if the work wasn't done by him then it's not steroided.

I will give Tim a call tomorrow, if I can get 17+ fpe at the muzzle with just the mods, that is enough for my needs ... using a heavy pellet giving me over 12fpe at 50 yds because of the high BC. Any FPE over this is a major gift for my use. I would love more FPE but we will see ?

wll
« Last Edit: February 14, 2019, 10:41:37 PM by wll2506 »
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Offline Jeb Hoge

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Honestly, I'd send in the gun and let Tim do the work. That way you know it's right, and he's a perfectionist so it'll be RIGHT.
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Offline tkerrigan

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Just make sure you send him an accurate gun, steroiding won't make it any more accurate.  If you buy a gun from Tim, have it shipped to you first to check accuracy, that way it can probably be returned to Crosman if it is a scattergun.  Regards, Tom
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Offline wll2506

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Called Tim and had a great conversation.

Talked about how the quality of these Benjamin guns are not what they used to be, and if you hear anything strange going on or roughness.... stop... and send the gun to him ! Said the steroid mod is more than just parts, itís what he does the the insides of the gun that make it perform 24-30 fpe depending on the things that are done !!!!! That turns your 392 into a gun that will last a lifetime and perform at more than peak performance :-)

I just got my 392, Mac1 mount, rings and installed the butt stock pouch.... will send a pic after supper in another post .... Scope arrives Tuesday.

wll
  • Lancaster, Ca.

Offline wll2506

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Just make sure you send him an accurate gun, steroiding won't make it any more accurate.  If you buy a gun from Tim, have it shipped to you first to check accuracy, that way it can probably be returned to Crosman if it is a scattergun.  Regards, Tom

Yes, that is very true, Tim kept saying, have the work done on an accurate gun !!

wll
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Offline Habanero69er

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Called Tim and had a great conversation.

Talked about how the quality of these Benjamin guns are not what they used to be, and if you hear anything strange going on or roughness.... stop... and send the gun to him ! Said the steroid mod is more than just parts, itís what he does the the insides of the gun that make it perform 24-30 fpe depending on the things that are done !!!!! That turns your 392 into a gun that will last a lifetime and perform at more than peak performance :-)

I just got my 392, Mac1 mount, rings and installed the butt stock pouch.... will send a pic after supper in another post .... Scope arrives Tuesday.

wll

That was my understanding also.
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Offline Hobbyman2007

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My steroided gun will make 30 fpe  on ten pumps . Not sure what was done as I bought it used but it is way more powerful than a friends stocker .
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Offline Habanero69er

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Wow! That's about 10fpe more than my Steroided Racine 342 with 10 pumps.
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Offline Tack Driver 10

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My steroided gun will make 30 fpe  on ten pumps . Not sure what was done as I bought it used but it is way more powerful than a friends stocker .

3 FPE per pump is really hot.
Must be a very special gun.
30 FPE with 14.3 CPHPs would be 972 FPS.
Can you post the pellet weight and velocity please?
« Last Edit: February 19, 2019, 06:21:49 PM by Tack Driver 10 »
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Offline ecolwell

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I purchased a "new model" Steriod 392 from Tim a few years back and have been very pleased with it.  Attached is a chrony list with different pellets and pumps.
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Offline Hobbyman2007

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My bad , I went through my notebook with all of my chrony tests . I hit 655 fps with 31 grain BBT bullets with 14 pumps . Not the 10 pumps I thought. Just to confirm I just ran a test with 5,7,10,12 and 14 pumps using the 31 gr BBT bullets .
5=475
7=564
10=583
12=618
14=709

At 14 pumps the gun starts to retain air ,not a lot but enough to push a pellet out of the bore . Safe to say this rifle puts out over 30FPE . Iíve been thinking of adding a small reservoir to get a follow up shot or two. Iíd hate to mess this one up , sheís a real good shooter . Iíll try with some JBS 25 grainers to see what it does , it really likes heavier weight projectiles .
« Last Edit: February 21, 2019, 07:56:26 PM by Hobbyman2007 »
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Too many guns to list and  not enough time to shoot them .

Offline wll2506

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My bad , I went through my notebook with all of my chrony tests . I hit 655 fps with 31 grain BBT bullets with 14 pumps . Not the 10 pumps I thought. Just to confirm I just ran a test with 5,7,10,12 and 14 pumps using the 31 gr BBT bullets .
5=475
7=564
10=583
12=618
14=709

At 14 pumps the gun starts to retain air ,not a lot but enough to push a pellet out of the bore . Safe to say this rifle puts out over 30FPE . Iíve been thinking of adding a small reservoir to get a follow up shot or two. Iíd hate to mess this one up , sheís a real good shooter . Iíll try with some JBS 25 grainers to see what it does , it really likes heavier weight projectiles .

Wow, that gun is real mo#%, Iíd consider that gun for ďTrash Can ElephantsĒ for sure (Large Raccoons)

That gun has some serious power !!!

wll
  • Lancaster, Ca.

Offline Habanero69er

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Those are still pretty darned good numbers Denis. I'm with you on using heavier ammo.
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Offline Yng@hrt

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I purchased a "new model" Steriod 392 from Tim a few years back and have been very pleased with it.  Attached is a chrony list with different pellets and pumps.
Those are very nice numbers but 14 pumps to get to 700fps would wear me out.
Have you tested the gun for accuracy with the different loads? I would assume heavier loads are more accurate with a sterioded gun.
  • New Mexico
Benji's;
2-Prewar '42 312's, '68 312, '69 347, '82-'86 342 (checkered), '90 342 (non checkered), 2-'91 S392P's, '93 S397P, '93 397P, '95 S397P, '96 392PA (w/"P" trigger group), & a '53 137 pistol.
Dan's;
Several Vintage Silver & Blue Streaks, H9 & H9A, including a '69 Silver w/factory Williams.
Daisy's;
Most notable- 2-Model 21's, 882 w/factory Williams, 2-Golden Boys & 4 Golden Spikes, Christmas Dream 20,25,30,35, Model 1894's; RME, Win, Spittin Image, Limited Edition, 2-BBS, 2-NRA, Wells Fargo, Sealed Box 1894, 880's; 20th Anniv, Silver Anniv, Eldorado, & '71 model. Red Ryder signed by David Sanders, & 2 Pony Express.
Crosman;
'49 101
Favorite everyday backyard plinker '71 880. Easy to pump & the sweetest modified trigger.

Offline Hobbyman2007

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My 392 is my truck gun equipped with a Williams peep sight . I keep a tin of well lubed BBT bullets in the glove box . During hunting season that is . I havenít missed a partridge or rabbit with it yet . Come to think of it I think Iíll make some stew ........ mmmmm mmm rabbit stew.
  • Dowling,ontario, Canada
Too many guns to list and  not enough time to shoot them .

Offline Yng@hrt

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Rabbit? Should be ready in about 4hrs. :D
  • New Mexico
Benji's;
2-Prewar '42 312's, '68 312, '69 347, '82-'86 342 (checkered), '90 342 (non checkered), 2-'91 S392P's, '93 S397P, '93 397P, '95 S397P, '96 392PA (w/"P" trigger group), & a '53 137 pistol.
Dan's;
Several Vintage Silver & Blue Streaks, H9 & H9A, including a '69 Silver w/factory Williams.
Daisy's;
Most notable- 2-Model 21's, 882 w/factory Williams, 2-Golden Boys & 4 Golden Spikes, Christmas Dream 20,25,30,35, Model 1894's; RME, Win, Spittin Image, Limited Edition, 2-BBS, 2-NRA, Wells Fargo, Sealed Box 1894, 880's; 20th Anniv, Silver Anniv, Eldorado, & '71 model. Red Ryder signed by David Sanders, & 2 Pony Express.
Crosman;
'49 101
Favorite everyday backyard plinker '71 880. Easy to pump & the sweetest modified trigger.

How do you word it... "Air Guns" or "AirGuns"?
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