Quickie 45acp pistol Silencer question,... load update

[shooter444]

Thought I would put this up top, to make it easier to access,...

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OK,... UPDATE!!! As promised.

I found some Enforcer Powder, got some Star Line 45 Super brass, and some CCI Pistol Magnum Primers.

Load data for Enforcer Powder for 45acp w/230gr bullets is ,...
12.9gr-947FPS-17,003PSI
13.7gr-996FPS-17,663PSI
14.5br-1,060FPS-19,393PSI

I started with the minimum load, and got immediate positive function results!! In fact, it shot like a laser, dead on my red dot setting with no adjustment needed.

This is a VERY STOUT LOADING,... I immediately started loading down .3ths of a grain at a time. I got larger groups and wider brass ejection patterns the less I loaded. At 12 grains I got a fail to go into battery, so I went back to the recommended minimum data (12.9 grains) and immediately got laser results at 25 yards and tight brass pattern at 3:O-CLOCK with three foot ejection distance.

My concern now is at this loading,( what I would cal +P load ), I may be battering the slide more than I normally like with the factory captured recoil spring,.... so, now I will search and find the best recoil spring power range for this loading and use the Wolff full length guide rod I bought last week to see if I like a heavier spring, better, at this loading, in this pistol.

Any thoughts or recommendations are appreciated!
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ORIGINAL POST,...


Just a Quickie, here it is,... has anyone had to change the strength of the recoil spring, when installing a silencer,... as in, stronger, or, weaker spring?

edit,... SORRY,... I am talking about 45 acp semi-auto pistol!

thanks

[DuneShoot]

If you're talking about an AR-15 or AR-10 style rifle sometimes a heavier buffer is needed for reliability.

I used a 'slash heavy buffer' for a short time on a 308 AR.

[superdrag67]

For pistols I've never had to change anything for reliability. If you are trying to maximize suppression then it's something you could play with.

For AR15 style rifles I usually put an adjustable gas block on them even though they function without it. Just trying to cut down on gas in the face.

[QuietM4]

Depends on the pistol mechanics. Didn’t have to change anything for a Glock 21, but i had to change to a lighter spring for my 1911.

[shooter444]

Good Morn'n Gentlemen! And thanks for the replies!

I didn't have a lot of time when I originally posted,.... so, let me expand on what my situation is.

I decided to play around with my favorite pistol, a S&W M&P45 full size. I decided I wanted to see if I could direct muzzle blast/sound, reduce some recoil with added barrel weight,... by loading some very slow plated bullets, for all the previous goals.

In other words, I am not dealing with an actual "silencer",... it is actually a barrel extension. It is 5" long, diameter much like a silencer, and, it definitely has the weight of a silencer,... in fact, it may weigh more!

Experimenting, I found that with stock recoil spring and factory ammo, all functioned well.

But, when I tried my targeted, slower, hand rolled ammo,... failure to eject was rampant!!!

So, I started LOADING UP! Only to find reliable function at a load point way above recommended data!

Obviously, my basic problem is that the recoil level was insufficient (unless I am wrong),... which led me to believe that the increased/added muzzle weight, from the barrel extension, was slowing the slide enough to cause ejection failure.

So after investing in a threaded barrel and the extension, I decided,... in for a penny-in for a pound,... and converted over to the Wolff non-captured recoil spring and guide rod,... with a lighter 14# spring. Thinking the lighter 14# spring would have less resistance and allow proper cycling!

Which failed as well!

So I started cutting the spring down, but, before I could get light enough resistance for a dependable cycling,... I wound up with too little resistance, and failure to go into battery!

So, thinking I must has concluded incorrectly, I posted here to see if someone with "silencer" experience may have dealt with such a problem with extra slow subsonic ammo.

QUESTIONS???

[AZDESERTRAT]

Suppressors have a spring loaded attachment (recoil booster) that allows the gun a split second to unlock and start to cycle before the true weight of the suppressor is felt on the barrel. I doubt any browning type actions would work reliably at all without one on a can. Fixed barrel pistols like a ppk don’t require a booster.
Not sure if that helps or not.

[shooter444]

Suppressors have a spring loaded attachment (recoil booster) that allows the gun a split second to unlock and start to cycle before the true weight of the suppressor is felt on the barrel. I doubt any browning type actions would work reliably at all without one on a can. Fixed barrel pistols like a ppk don’t require a booster.
Not sure if that helps or not.

ARE YOU KIDDING!!! That is fantastic, I had no idea such a "recoil booster" even existed!!! Definitely something to investigate,... thank you!!!

[shooter444]

Well, after a frantic web search, I finally found a EXTERNAL BOOSTER, since the barrel extension cannot have a normal booster threaded into it.

Well, besides the added cost, I have read enough to understand that a "RECOIL BOOSTER" does exactly what it is called,... BOOSTS RECOIL,.... which is counter productive to my quest.

So, I guess I'll just have to give up on extra slow subsonic loads, and, try and develop some high velocity, light weight, 45 acp bullet loads, with more recoil.

[QuietM4]

Sounds like after all this money you've invested into different parts and adapters, you could have just built a Form 1 suppressor...

[shooter444]

Not really,...

$130,... silencerco stainless threaded barrel
$60,... usmachinegun barrel extension
$30,... wolff spring and guide rod replacement

total,... $220

Hardly the cost of a stamped silencer,... and,... without months of waiting, too boot!!!

[QuietM4]

Form 1 suppressors are being approved in less than a month, currently. You can build a home made suppressor for less than $300. Then you can have something that is available for multiple platforms, and doesn't require specially made ammo.

But, if it makes you happy, have fun.

[shooter444]

I thank you for your bias opinion,... but, I think we both know that 30 days is pie in the ski, and, $300 for a hand made, is a guesstimate,... and then of course there is $200 for the Uncle Sam stamp. Not to mention the probability of a few other costs, I am clueless about.

So, if you don't mind, I'll pass on the blue smoke.

[XJThrottle]

I've had two eForm1s returned in under two weeks. Click to enlarge. You'll have $200 in the stamp, but the rest depends on your skills and available machinery. Simple kits that you basically just drill are a couple hundred bucks.

Just an example I found online.
http://www.quietbore.com/#!/Solvent-Tra ... ort=normal

[shooter444]

Well, with no available machinery, that really isn't an option.

Don't forget the recoil booster,... they don't give them away!

[XJThrottle]

I'm aware. In for a few.

This is my current stamp wait times list.