Originally Posted by lineman69
Just looking for some imput from you guys.Ive been working up a load for a new custom built 300 WSM.Im using norma brass 168 bergers & RL17.I have tried 59 to 65 grains and all loads give sticky bolt lift but not really flattened primer. Im afraid my original assesment that this gun has a head space problem.Looking for your thoughts or experiance.I dont feel that im off on my loads as I load 67.5 GR. in a factory 300 WSM. at max.load. Any imput would be welcomed.
There are several things that can cause this problem and hear are a few.
First= check and see if a bullet will go in a fired case. (If it won't the neck of the case is to long
for the chamber and must be trimmed.
Second= If you are seating against the lands you will have to back off 10 or 15 Thousandths
Third= Look at the fired brass and if it has rings around it then the chamber may be rough
and cause extraction problems.
And last but not least , Spend 35 to 40 dollars and buy a head space gauge and prove that
the head space is or is not correct. If you can get some shim material in .002 thousandths
you can try 1 small piece on the bolt face (Stuck on with grease) and see if the bolt will close.
If it doesn't then you are allright. If it does then add the other shim and if it still closes you
may have a problem. and if you can get three shims (Total=.006 ) is two much and I would
recomend having the shoulder back and re head spacing.
Caution; The head space gauge is very hard so don't force the bolt closed on it just close it
with your finger tips until it stops to prevent chamber damage.
I'm sure the membership can come up with some other reasons you are having problems
and will chime in.
J E CUSTOM