07-16-2012, 10:48 PM
For Part A, see http://www.65grendel.com/forum/showthrea...h+velocity. The plot shows that you would lose some, about 100 ft/sec, when reducting the barrel length from 24" to 20".
Part B, Several of the custom barrel makers have tools that help get this -- but it isn't a lot of weight.
Part C. There are two factors that will impact your accuracy. The first is important only if you are using iron sights and the front sight is on the barrel. In this case the sight radius is shortened. This is not likely a worry for you.
The second factor can be a surprise -- the slightly lower muzzle velocity increases wind drift by a little bit.
Bottom line for accuracy -- there should be no discernable impact when you are using opitical sights and are in any but the most competitive long range shooting games.
Part B, Several of the custom barrel makers have tools that help get this -- but it isn't a lot of weight.
Part C. There are two factors that will impact your accuracy. The first is important only if you are using iron sights and the front sight is on the barrel. In this case the sight radius is shortened. This is not likely a worry for you.
The second factor can be a surprise -- the slightly lower muzzle velocity increases wind drift by a little bit.
Bottom line for accuracy -- there should be no discernable impact when you are using opitical sights and are in any but the most competitive long range shooting games.