how much velocity increase...

[troy_mclure]

...with gas checks?


approximately how much more velocity could you push with gas checks, over normal cast boolits?

[Lloyd Smale]

way to many other variables come into play to quote a figure like that but if put on the spot to give a general statement and it is a very general statement id say about 300 fps.

[Larry Gibson]

Lloyd indeed gives a "general statement" that is close.  However, there are many variables to your question; rifle or handgun, what cartridge, twist of barrel, accuracy requirement, etc. For example; with a 6" barreled .357 Magnum I get 200-200 fps more velocity with equal accuracy using GC'd bullets.  In regular rifle cartridges with standard twists I get 500-800 more fps with equal accuracy using GC'd bullets.  With my .308W with a 14" twist barrel I get closer to 1200 fps more velocity with equal accuracy using GCs.  Then there are the excepetions; in my trapdoor 45-70s I get equal accuracy with either type of bullet as the strength of the rifle is the limiting factor.  However in my Siamese Mauser 45-70 I gan get 500-700 fps more velocity with equal accuracy using GCs.  All the above is why you got a "general statment" from Lloyd.

Larry Gibson

[troy_mclure]

all i was looking for was a general statement! thanks.