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  #1  
Old 05-19-2017, 11:23 AM
Taxman Taxman is offline
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.45 Super in Stainless Expert?

I assume my 2015 production Stainless Expert has a strong enough barrel for .45 Super, and it appears that it has enough case support.

Obviously, I'll need to reduce slide speed (which is already a bit excessive with factory 230gr ball ammo), but I'm thinking that with a EGW firing pin stop and a variety of mainsprings, and maybe a 20lb recoil spring I should be good to go up to 25-28k psi?

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Old 05-19-2017, 01:30 PM
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RickB RickB is online now
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The strength of the barrel certainly isn't a concern, and your case support looks good.
I ran max recommended charges with the EGW stop, 25# main, and 22# recoil spring, and was getting 6-foot ejection (max loads in Delta Elite eject 20+ feet).
.45 Super is a lot more powerful than .45 ACP, but pressure-wise, it's still not especially powerful.
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Old 05-19-2017, 05:38 PM
DG1 DG1 is offline
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Quote:
Originally Posted by Taxman View Post
I assume my 2015 production Stainless Expert has a strong enough barrel for .45 Super, and it appears that it has enough case support.

Obviously, I'll need to reduce slide speed (which is already a bit excessive with factory 230gr ball ammo), but I'm thinking that with a EGW firing pin stop and a variety of mainsprings, and maybe a 20lb recoil spring I should be good to go up to 25-28k psi?

Mine has what I consider to be a 'huge' radius on the factory firing pin stop.

I think you are on the right track with your thinking here.
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Old 05-19-2017, 06:07 PM
Taxman Taxman is offline
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Originally Posted by DG1 View Post
Mine has what I consider to be a 'huge' radius on the factory firing pin stop.

I think you are on the right track with your thinking here.
Mine can infuriate a shooter standing 10' to my right as it flings brass at the top of his shirt.
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Old 05-19-2017, 07:30 PM
DG1 DG1 is offline
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Originally Posted by Taxman View Post
Mine can infuriate a shooter standing 10' to my right as it flings brass at the top of his shirt.
Tweaking (changing) the firing pin retainer will help you keep your recoil spring weight lower very inexpensively and easily.

Slide speed matters in both directions and the heavier the recoil spring the more barrel 'dip' you have to contend with when things lock up / slam shut.
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Old 05-19-2017, 09:03 PM
Taxman Taxman is offline
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Originally Posted by DG1 View Post
Tweaking (changing) the firing pin retainer will help you keep your recoil spring weight lower very inexpensively and easily.

Slide speed matters in both directions and the heavier the recoil spring the more barrel 'dip' you have to contend with when things lock up / slam shut.
Correct on both counts.
Isn't the information superhighway great?
20 years ago all I'd have known to do would be to look for bigger recoil springs.

Since I want to go for max power eventually, I'm looking to maximize the hammer's leverage on the FPS. If I'm too successful at that and can't get full slide travel with 230gr at 860fps, I can always put weaker springs in it.

Eventually I'll probably buy a compensated barrel and play with Rowland loads in Super brass.
There's two things keeping me from buying a Rowland barrel, it won't headspace properly with ACP, and the brass is too long to use the cannelures in common bullets.
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Old 05-20-2017, 10:03 AM
DG1 DG1 is offline
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Originally Posted by Taxman View Post
Correct on both counts.
Isn't the information superhighway great?
20 years ago all I'd have known to do would be to look for bigger recoil springs.

Since I want to go for max power eventually, I'm looking to maximize the hammer's leverage on the FPS. If I'm too successful at that and can't get full slide travel with 230gr at 860fps, I can always put weaker springs in it.

Eventually I'll probably buy a compensated barrel and play with Rowland loads in Super brass.
There's two things keeping me from buying a Rowland barrel, it won't headspace properly with ACP, and the brass is too long to use the cannelures in common bullets.
The weight of the 460 barrel and compensator ALONE will slow things down considerably even if you change nothing else.

You should definitely give the compensated barrel a go if you can. From reading your posts here I seriously doubt you will have any issues getting it to run the way you want.
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