A couple of situations have occurred recently that reminded me of the fact you can always learn--or relearn--something new and significant related to safe handloading practices. I thought I'd share them with you.
Thank you! That’s what I was after.A couple of situations have occurred recently that reminded me of the fact you can always learn--or relearn--something new and significant related to safe handloading practices. I thought I'd share them with you.www.shootingtimes.com
I would only add that if it also extracts effortlessly w/o firing.Using new brass is never a bad idea but if the used brass chambers effortlessly before firing it rarely ( never for me) is/should be hard to extract after firing unless you have other issues (over pressure or chamber dimension)
Let me throw another one at the hive. I made a mistake referring to my measurements earlier. My average Chamber length was 2.890 (case length to ogive). I loaded all my rounds to 2.850 (ogive). That would give me .040 off lands...not the .005 like I had thought. Guess that’s why you keep notes.
I’ve added a photo with the primers and charges. You can see there is some flattening, I just don’t really believe that it is significant enough that I should be concerned with the pressure at 70grains. Again this yielded the best group at about .5moa. Could slight flattening be an indication of excessive head space? It’s still closer to the lands than factory ammo, but with higher charge, I’m wondering if this could be a culprit to the stuck case at 70.5g, and if my 70g load, which shot great and had no extraction issues, should even be a concern at all?
When you changed barrels you changed everything. You can not just pick up where you were before on your old BBL.I recently had a proof barrel put on my .300WM Sendero. I’m working on developing a load, and have yielded good results from 70gr of IMR4831, with a Nosler AB 180gr. In fact that is the same recipe for the weapon prior to adding the new barrel.
Here is my “hmmmm” moment. I had no indication of over pressure from that build. No bulging, cracking, sticking, and primers looked good. HOWEVER...when I went up to 70.5 during my test, my case was stuck and I had to try quite a few times to get the bolt to latch on and extract. This was the same for all of the rounds loaded at 70.5. At 71 gr I had to use a rod to get it out. I tested it again with a factory load and had no issues with extraction. All my cases are full length sized and under max case length. Bullet is seated .005 off lans. The max load for that powder is 73.
Why this worries me is if I’m getting stuck with a .5 gr increase going 70 to 70.5, is 70gr too risky to use when hunting? I was lucky enough to draw a moose tag for my home state and can’t have a stuck case screwing that up. I don’t know if temp changes will impact the material enough to where even the expansion for my 70gr charge will cause the case to stick. Could it be something else??
Thanks for posting . I will have to give this a try.This is the way I find the lands. I used to do the dummy round and comparator however I was finding lots of discrepancies. I started using Alex’s method and it is very consistent. Give it a try and see if it changes things for you.