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Post by needsmostuff on Feb 8, 2015 11:36:06 GMT -5
I'm pretty new at pistol cartridge lever guns and don't have a chronograph. Right now I have a 16" and a 24" and that got me wondering what the 16" was sacrificing. Years ago I remember them coming up with about 100fps. per inch on a 30-06 or something like that. But .22s seem to peak at about 16" then start to loose velocity in longer barrels. I know it's chuck full of variables ,bullet type ,speed of powder etc. but what does your experience tell you about 44s in a rifle ?
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Post by bradshaw on Feb 8, 2015 12:58:08 GMT -5
needmostuff.... hypothetical velocity loss of 100 fps per inch in .30-06 is incorrect. Reckon closer to 20-25 fps per inch. A .22 LR may or may not lose velocity going from 16" to 24" barrel. Accuracy depends on quality of barrel & chamber, not length. As a rough, very rough, rule, a .44 Mag fired in a rifle stands to gain 300 fps over revolver velocity.
A revolver with its chambers separate from the barrel, and with a spectrum of cylinder gaps, chamber throats, forcing cones, and bore dimensions, does not easily submit to judgement calls on velocity-per-inch. The old Federal .44B 180 JHP averages 1610 fps from my 5-1/2" Redhawk (exact velocity listed in Federal literature). Same Fed 44B from my FA .44 (built to my specs by Jim Stroh) with 10" Shilen barrel averages 1925 fps. Expect greater velocity from your 16" carbine and 24" rifle.
Two measurements which predictably hurt revolver velocity are: 1) excess throat diameter; 2) wide cylinder gap. Of the two, cylinder gap has little or no bearing on accuracy.
David Bradshaw
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Post by serialsolver on Feb 8, 2015 16:57:07 GMT -5
Look up ballistics by the inch on the internet. The have examples you can look at.
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Post by needsmostuff on Feb 9, 2015 14:37:41 GMT -5
I found the ballistics by the inch site and it answered all my questions and some I had not thought to ask , Thanks
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