Re: 300 wsm sizing problem
Many times the factory chambers are not as straight as they should be. If that's the problem and you didn't index the reloaded case to go back into the chamber the SAME way is was extracted out when fired, it will go in hard.
If it's a factory die, it will not (in most cases) resize the web area of the case which has probably expanded also.
The overall case length of ANY reloads should be trimmed back .010" to start with. This allows for case stretching. The lower the shoulder angle, the more stretching and brass flow will occur. A 17 degree will stretch more then say a 35 degree in most cases.
Check your die also for a build up of grease and dirt. If that happens, the case will be sized off angle. Clean your dies often.
Set the die (as a last resort) to over cam when the ram comes up. This will bump the shoulder back very slightly. Don't overcam by more then .001" or .002".
I would suggest firing factory rounds and marking the base of the case with a felt marker as to a certain point on the action. This will index them and then after reloading, put them back in the SAME way they came out.
If that don't solve the problem, check the die for dirt and also make sure the case length is proper.
If it's expanding in the web, a custom die that comes further down the case may have to be considered.
I think the indexing may just solve it though?
Let us know how you make out.
Factory chambers are many times the problem.
PS--As an ad on here, check the Ojive of the bullets used. If you changed bullets from one firing to the next, the Ojive can be off by more then the .030" you say your off the lands. Even in the same bullet brand and weight, I have seen the bullets be off quite a lot.
Try seating all bullets just a bit further into the case and see if chambering is easier.
[ 03-28-2002: Message edited by: Darryl Cassel ]