Suppressors Newbie Suppressor Q's

[sawgunner2001]

Just received a Specwar 762 as my first suppressor. Hosts are:

20" AR15 (5.56)
10.5" AR15 (5.56)
18.5" LR308 (.308)
26" Savage LRP (6.5 Creed)

I've used the can on all hosts except the 308 AR. My biggest "issue" is on the SBR. Perceived recoil has increased with the addition of the can. As a comparison, I've shot this rifle with a flash hider, a muzzle brake, and now with the can. With the can on, brass ejection is relatively weak and to about 1:00-1:30. Without the can, ejection is positive and to about 3:00-3:30. Currently running an H2 buffer. This rifle has a PWS piston upper that has yet to malfunction. But what is causing this perceived increase in recoil and why does ejection appear to be anemic?

Also strange, I've had the problem with Hornady factory ammo blowing primers in the 6.5 Creed that seems to have stopped when the rifle wears the can. I thought pressure would have gone up, but that doesn't appear to be the case. But, I've only had the can out on this rifle once so far.

 

[Buckeye308]

Your Sbr is over gased, the bolt is slamming to the rear causing the perceived increase in recoil. Can't really give you an answer on the Creedmoor.

 

[sawgunner2001]

Newbie Suppressor Q's

Your Sbr is over gased, the bolt is slamming to the rear causing the perceived increase in recoil.

Is an H3 buffer a solution to this?

 

[Assault116]

Is an H3 buffer a solution to this?

Possibly, But I'd try adjusting your gas block first. seems it should be in position 3 or 4 as noted on the web page

PWS MK1 Series: Long-Stroke Piston System

Supressing a gas gun nearly always increases the impulse that runs the bolt or in your case the piston that runs the bolt.

 

[Donr13]

Over gassed on the sbr. Try adjusting the gas block first.

 

[Buckeye308]

Possibly, But I'd try adjusting your gas block first. seems it should be in position 3 or 4 as noted on the web page

PWS MK1 Series: Long-Stroke Piston System

Supressing a gas gun nearly always increases the impulse that runs the bolt or in your case the piston that runs the bolt.

This, adjusting the gas block is the best way

 

[sawgunner2001]

No can do. My upper is a Mod 0, no adjustable gas.

 

[jasonfaz]

Try grabbing either a PWS H4 or a Slash's 8.5oz buffer and swap your spring for a SpringCo Extra Power M4 spring (red spring).

 

[jasonfaz]

That should increase lock time and reduce the velocity of your reciprocating mass which can have significant effect on the recoil impulse you're feeling.

 

[Conqueror]

Agree we the above. The anemic ejection might be related to trying to extract the case while pressure is still elevated due to the faster cycle time with a suppressor attached. Extending the dwell time with buffer and springs will likely help. Would also recommend ensuring you have a good Crane extractor spring, insert, and o-ring to ensure maximum power when trying to pull the empty case from the chamber. When I first used my 10.5" AR with a can I had a lot of extraction failures and weak ejection. The BCM Crane kit took care of that.

 

[sawgunner2001]

Thanks for the suggestions, gents.

 

[sawgunner2001]

To update, Slash's XH carbine buffer and Wolff XP spring have solved the problem.

Suppressed ejection is positive and to about 1:30-2:00. Unsuppressed ejection is also positive and straight out to 3:00.

Clint was helpful and answered my question(s) via email promptly within a day.

 

[benchmstr]

an overgassed SBR!!?! say it isnt so lol

slash is always my go to for this problem also

bench

 

[jasonfaz]

To update, Slash's XH carbine buffer and Wolff XP spring have solved the problem.

Suppressed ejection is positive and to about 1:30-2:00. Unsuppressed ejection is also positive and straight out to 3:00.

Clint was helpful and answered my question(s) via email promptly within a day.

Nice! Good to hear. Slash's heavies are top notch!