Originally Posted by MikeJK
If you're running a short barrel such as a SBR you want a heavier bullet to make up for the lower velocity, correct?
Depends on your theory of use. At ranges over 200 yards regardless of bullet weight velocity out of a very short barrel becomes a problem. Thats why the military m4 has a rough time at the longer ranged targets fighting the muslim brotherhood.
Short range city house to house or oh sht sd situations when its up close doesnt matter.
What really matters is the varience of the ballistic coefficients of different bullets and exactly how far out your chosen round in a given barrel drops below supersonic. How much drop your given loading has. Then you have info on which you can base your decision.
The reason i like 55grain fmj is because with a 100yd zero it will hit minute of goblin from 0 to 300 yards holding center mass sight picture and liekly disintegrate on impact stopping all aggressive action quickly.
I like 69grain for target shooting because it hase a good mix of retained velocity and a nice coeffficient that keeps bullet drop inside the adjustment range of the iron sights out to 600yds. Plus its what my nm rifle likes the best
Its not the only solution to the problem its just what my preference is with my reasoning behind my individual choice. It also means i can keep the shooting lessons simple for my wife so she can retain what she learns.
Its easy for her to know all she has to do is put the sight on the goblin's chest and pull the trigger until he stops. Simple. She doesnt have to factor in wind or bullet drop just remember center mass. This lets her engage targets out to 300yds and not worry about all the whys and wheres of shooting.