300WSM trim length

[257 Ackley]

The Nosler manual shows 2.100 as the length of the case for all WSM's. Has anyone got a trim lengh for minimums and has onyone shot cases that were slightly over (5 thousands)?

 

[DrMike]

2.100 inches is the maximum SAAMI length. Trim length is 2.090 inches, as recommended trim is standardised at 0.010 inches on all cases. Should a case grow longer than the maximum, there is always a danger of increased pressure. These measurements assume SAAMI standardised chambers. Were a chamber out of specs, it is possible that the neck could be longer without creating excessive pressure. However, it is always a good practise to assume standard conditions, unless you have evidence of deviation in your chamber.

 

[SJB358]

Joel, Mike is spot on. I have found that a trimming to a minimum lasts quite a few reloadings. So you won't have to do it much once you get it under. That is one of the other reasons I like the WSM's as they don't seem to stretch to awfully much, at least in my little bit of time with them. Scotty

 

[257 Ackley]

Thanks guys, four of the 20 shot are over the limit by 2-5 thousandths. Will be best to have them all the same length anyway.

 

[DrMike]

Will be best to have them all the same length anyway.

Absolutely!