Originally Posted by Jeebes
Im relatively new to long range hunting and shooting. Life long hunter thought. Im building a 300 WSM on a stiller predator short action.
Is a 30 inch barrel too long? What is the optimal barrel length?
I have a general rule that works to get the best all round performance of most cartriges that
goes like this.
Case capacity = Up to 50 grains of powder =22'' to 24'' barrels.
Up to 75 grains of powder =24'' to 26'' barrels.
Up to 100 grains of powder = 26'' to 28'' barrels.
And over 100 grains of powder 28'' +.
Your 300 WSM will fall in the 24'' to 26'' bracket
These barrel lengths will get most of the velocity that the case can produce.
Add a few inches more you may get more velocity but the percentage will not be as good per inch.
Where the largest bullets available are used, 2 more inches will help with huge ammounts of slow
Dan Lilja of Lilja barrels did a barrel length test and started with a 44" barrel and cut 2'' at a time,
It is a good read.
J E CUSTOM