Fire forming?

wisconsinteacher · Dec 11, 2010

I have 200 rounds of IMI 7.62 brass and want to fire form them to 6.5 Grendel in my AR15. I took two of them and lubed the outside and inside the neck. Next I installed the Hornady 6.5 sizing die as directed and ran the cases through the press. It did not take a lot of force to resize the brass, is this normal? Also, when finished, I took one of the cases and put a 129 gr Hornady SP and seated it to just under mag lenght. The one thing I notice is that when I loaded my mock round into my rifle, I had a very hard time getting it out of the chamber. Is this do to the case being too long. It did it both on the case with a bullet and one without a bullet. I do not have a case length gauge or a case trimmer for this round yet. So by what I have do so far, am I good to go and size the rest of them then wait until I get a case trimmer or should I wait and see if the trimmed case feeds into the rifle better? Thank and sorry for the long post.

DrMike · Dec 11, 2010

Resizing does not require a lot of force if the case is properly lubed. As to the tight fit in the chamber, I'd trim the case, though I suspect that the reason it is hard to extract has more to do with the fact that it is not fire formed yet.

rick smith · Dec 12, 2010

Case neck thickness shouldn't be the problem but it is worth a check.Rick.

wisconsinteacher · Dec 12, 2010

Could it be that my FL sizer is not sizing them all the way and I need to screw it down a little more to set the shoulder deeper?

DrMike · Dec 12, 2010

If you didn't cam over when you sized, it is possible that the shoulder is not set back enough. Try it and see what happens.

wisconsinteacher · Dec 12, 2010

Well I set a little deeper and they run now. I did make a few dummy rounds and had to set the bullet faily deep so they could extract without issue. Is there a way to measure the lands on an AR or auto like I did with my bolt gun?