what length should i trim to?

[avd]

i used a sinclair chamber length gage insert to measure my chamber length. I did it three times and got the same number each time which is 2.043". So what length should i trim my cases at?

Thanks again,

avd

 

[Victor N TN]

Re: what length should i trim to?

I know a LOT of people that trim to factory spec. I also know several people that trim to their chamber. If you are loading for more than one rifle, you need to either trim them all to the book, or mark the different length rounds. For my bolt guns I trim to the chamber length -.005" to -.010" This will keep your chamber throat from burning out as fast. But if you trade rifles or take the wrong box to the range, you may be up the creek until you get everything figured out.

The trimmer I'm using basically is a Wilson design. But my trimmer was all ground from bar stock and has a micrometer head on it. I can trim PPC cases or 300 WinMag to +/-.001"

If you're shooting a worn out chamber, it may not do you any good to trim to the chamber length. But if you have less than 2,000 rounds you may be able to extend the life of that chamber a little.

Good luck.

 

[avd]

Re: what length should i trim to?

Thanks again victor. I am only loading for one gun for now.

avd

 

[427Cobra]

Re: what length should i trim to?

I think the instructions said to subtract .024 on 30cals, where that number came from IDK, call Sinclair and and ask them to be sure.

 

[5R Milspec]

Re: what length should i trim to?

I am with Victor on this one.trimming to your chamber works great.and as he has stated it helps the throat area out.me just .005 back from what my chamber is.