Sheridan Steroid Pumpers - Sheridan Benjamin Crosman

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RickH said:
What is a steroid gun? Sounds like something that would get you kicked out of the Olympics for failing a drug test.

Rick H.
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That is an upgrade done by Tim McMurray, of Mac1 Airguns.
In the early C models:
He modified the pump linkage for adjustability, then sets it to its tightest tolerance
He modifies the valve and the transfer ports.
In the later models he modified the pump handle leverage. 👍
 
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Star7 said:
I had a sixties Sheridan steroided as it needed resealing and so on. That was mostly optimizing pump stroke volume with the adjustable piston rod and improving the exhaust valve and ports (and trigger). I was so pleased with the improvement in power/stroke that I sent him a new 392. On those he improves the hinge at the front and makes a billet pump arm as well as shifts the forend rearward to give more leverage. This was expensive, and I unfortunately did not write the $ down. Hang the price, I wish he would do this for my 397 but my efforts in contacting him have not been successful.
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397's are history correct?
 
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Has anyone here had the steroid procedure done lately and could share what is costs? Also, how long it takes to be completed? If memory serves and it doesn’t, when I talked with Tim at Mac1 earlier last year the procedure would cost around $275. Does this sound right? I never write things down because I’ll remember them.
 
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Bear-of-Grayling said:
Thank you. I didn’t build it however. Someone made this special rifle and I am blessed to be the next caretaker. It’s a Steve Corcoran stock.
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Of course. That makes sense it's a Corcoran... every time I see his work I drool.

On a sidebar I'm always looking for caretaker opportunities like this beautiful pumper hah!
 
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Bear-of-Grayling said:
Has anyone here had the steroid procedure done lately and could share what is costs? Also, how long it takes to be completed? If memory serves and it doesn’t, when I talked with Tim at Mac1 earlier last year the procedure would cost around $275. Does this sound right? I never write things down because I’ll remember them.
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I don't remember the amount, and I had extra work done like the receiver resoldered. So it was expensive. Unfortunately it went back twice under warranty, and still doesn't function properly. I spent a lot on shipping during that mess and it still needs to be fixed. Tim didn't pack them as well as I did, and I had damage the last time he sent it back to me.
20230424_210612.jpg

I never understood what he did to my trigger spring?
 
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Amazing pumper @BOG.
Mac 1 website looks to be down. From the research I used to do on his website I believe the mods to the best of my knowledge where as follows
Billet pump arm
Billet front plug
Adjustable pump piston
pump arm moved back for added leverage
Trigger polish mod for lighter pull
Valve volume increase
2 spring valve mod to reduce pump effort

I did the mods at home and got my 392 shooting at 740 fps with 15.49 pellets.
 
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Bear-of-Grayling said:
Talking here on AGN is a good thing. A couple days ago a member here reminded me of something that I have totally overlooked and forgotten. Funny how this happens. He mentioned the scope grooves on my custom steroid. Asked if it had them. Wow. I totally forgot this. So yesterday I dug around in my extra scope department and came up with this 4x32 Simmons Shotgun scope. The parallax is set to 50 yards for a shotgun scope if memory serves. Which clearly it doesn’t. Anyway, this Simmons can be manually adjusted through the front objective lens with a tool I made. Moves freely back and forth. Also has extra eye relief. The scope fit the 392 perfectly. Easy to cock, pump and load. It’s a very light weight scope also. Shot it in this morning at 40 yards using CPHP‘s. Five pumps and it’s sending them around 625 fps with very good accuracy. Thank you rokonman.View attachment 548220View attachment 548221
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This is a beautiful pumper —- holding it and shooting it only impresses you more!
 
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