Suppressors help or hurt velocity?

[nebhunt]

Maybe this has been discussed before, but I was wondering if a suppressor helps with the lost velocity of the bullet when the rifle barrel is cut down to install a suppressor? I know some of it would depend on the cartridge.

 

[hereinaz]

No.

Maybe a touch more velocity due to what has been called “freebore boost”. But, it’s never over 10-12 fps in my limited experience and reports from others.

 

[alexnelon]

You lose 25-40fps per inch you cut off.

A suppressor gives you 0-12 fps.

 

[nebhunt]

So not enough to make up for the loss in velocity from cutting the barrel down? If a guy buys a 6.5 PRC because it can launch the same bullet 150 to 200 fps faster than a 6.5 Creedmoor can and cuts it down, he now has a PRC that is on par with the Creedmoor. If I'm not mistaken the Creedmoor already has a shorter barrel to start with.

 

[alexnelon]

So not enough to make up for the loss in velocity from cutting the barrel down? If a guy buys a 6.5 PRC because it can launch the same bullet 150 to 200 fps faster than a 6.5 Creedmoor can and cuts it down, he now has a PRC that is on par with the Creedmoor. If I'm not mistaken the Creedmoor already has a shorter barrel to start with.

A 16 inch 6.5 prc will roughly match a 22 inch 6.5 creed. 6 inches is a lot of barrel.

A suppressor makes it quieter and mitigates felt recoil. It’s not supposed to make it faster.

 

[Matt5266]

0 to a dozen or so feet gain

 

[hereinaz]

So not enough to make up for the loss in velocity from cutting the barrel down? If a guy buys a 6.5 PRC because it can launch the same bullet 150 to 200 fps faster than a 6.5 Creedmoor can and cuts it down, he now has a PRC that is on par with the Creedmoor. If I'm not mistaken the Creedmoor already has a shorter barrel to start with.

Same barrel length, always more velocity with more powder. Like others said, a 16” PRC is like a 22” Creedmoor.

Below 18” the difference starts to shrink a bit faster, but over 20” the difference holds fairly steady between a magnum and standard, or a .223 and 22 creed.

 

[The Harbor Master]

Anecdotal but I have a 7RM that I chronoed with no can, and see zero difference in my dope with the can on. Adjustments are the same with/without suppressor out to 650yds. The 0-12fps is well within ES you'd see from factory ammo anyway, and probably a lot of handloads.