Hey guys,

I'm reloading for a 300 WM. I have a Lyman Universal Trimmer.

Yesterday I full length sized about 75 pieces of brass, cleaned them up and re-primed with winchester magnum primers. After I went through all this I measured a few and found hem to all be between .002 and .006 longer than the maximum case length.

So here come the questions:

1. Is that long enough to require trimming?

2. Can I trim brass that already has the primers in it?

3. What menthod do you guys recommend to get the trimmer set to the right lenth? Do you start big and continue cutting till you get where you want to be or do you use a caliper to measure the distance between the case holder and the cutting surface?

4. The manual says that max case length for the 300 is 2.62. So does that mean I need to cut the cases back to 2.60?

5. Anything else I need to be aware of?

Thanks

Tom