Suppressors MV FPS difference suppressed vs un-suppressed ?

[LJT88]

As the title says, what sort of difference are you guys seeing between suppressor on and off?

 

[Twitchy]

20fps at most in my experience.

 

[WeiserBucks]

I get +10-15 FPS between my two suppressors.

 

[NighthawkCG]

I saw a 15 fps difference on FA762SS w/FGMM .308

 

[chevy_man]

Depends....

My 25-06 was about 100, my 6.5 was 30, haven't bothered with anything else.

I was shooting over a Caldwell. It's cheap, and gets it close enough. There could be some variation from muzzle blast though.
Guess I should run out and use my buddies lab radar, but I don't know that I really care enough.

 

[nn8734]

Minimal, 10-15 fps at most across all my rifles, bolt and semi. Some of my rifles the suppressor added velocity but in a few cases velocity dropped a by a slight amount.