So according to that you gain 75 fps or so going from 24" to 26" in .223 but it doesn't list 22" so interpolate.
There are plenty of cartridges that really benefit from longer barrels...typically small diameter heavy projectiles of whatever sort. Maybe not enough, but they do benefit.
March 26, 2009, 12:03 AM
Not much. 300 yards isn't much distance. From what I have read .223 remington has about 90fps change from a 22"-26" barrel. I ran a ballistics program with a few different .223 weight bullets with a difference in velocity of 90fps. At 300 yards the difference in windage holdover in a 10 mph 100% value wind was half an inch(14.6" of holdover for the slower and 14.0" for the faster). The difference in bullet drop at 300 yards from a 100 yard zero was about in inch (13.3 inches of drop from the faster, 14.4 from the slower). Thats just what the program I used said real quick.
March 26, 2009, 12:13 AM
benzy2 is right. 300 yards isn't that far and the difference will be hard to notice.
March 26, 2009, 11:19 PM
I think the biggest differance you would notice is that longer barrels are easier to keep steady when shooting unsupported. Since they weigh more and have the weight farther forward, they tend to be a bit easier to keep steady. The differance in velocity probably won't be noticed much.
March 27, 2009, 12:26 AM
Many standard non-magnum cartridges gain about 25 feet per second per inch. So 4 inches equals around 100 feet per second (much of the time)
Once you start going less than 16 or 18 inches things change more per inch and depend more on powder and the specific cartridge.
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