• Help Support TNDeer:

Is this reload to hot?

Flattened primers does not always indicate excess pressure. Re check everything and also check other cases of the same lot.
Check head space of rifle.

After rechecking everything I may or may not reuse the case.
Just my thoughts of my head. I have some cases that I have reloaded more than 15 times and others no more than twice.
 
I too have seen where flattened primers were not a sign of excess pressure. Head space is fine, Winchester LR primers, bolt lift is easy as is extraction, and no ejector pin marks, no gas leakage from primer pocket. It is a Rem. Model 7 in 260 Rem. It is a max load of H4350(46.5gr) with 120 gr Sierra Pro Hunter. The results on game have been outstanding! 2 big does and a coyote. I have yet to chronograph the load yet. I will be checking the load with a new batch of brass as I believe loose primer pockets are the culprit. Have you any experience like this with a loose primer pocket? I have only experienced it once before with any of my rifles.
 
Was it the first firing of a new case? Sometimes new cases will have a little excess headspace until they're essentially fireformed to the chamber. Be sure to check the load using a once fired case that has had minimal sizing to fit the chamber and the results may be different. The excess headspace results in the primer setting back when it first ignites and then the case stretches back when the powder ignites and hits full pressure resulting in hammering the primer back into the case under full pressure by the bolt face. Voila! Flattened primer but no excess pressure. Excessive headspace can be caused by either a rifle out or spec or a cartridge out of spec.
 
It appears the NEW remington brass I used didn't cause any problems. After it was all shot up I reloaded some brass that was Remington factory ammo once fired. Thats where I remember the looser primer pockets from. Thats the lot I'm having flattening issues. All other variables between the 2 lots of brass are identical.(resizing, trim length, etc.) Good idea too Whelen Man! I will check with some neck sized after I recheck my brass.
 
AllOutdoors said:
It appears the NEW remington brass I used didn't cause any problems. After it was all shot up I reloaded some brass that was Remington factory ammo once fired. Thats where I remember the looser primer pockets from. Thats the lot I'm having flattening issues. All other variables between the 2 lots of brass are identical.(resizing, trim length, etc.) Good idea too Whelen Man! I will check with some neck sized after I recheck my brass.
Click to expand...

Get another box of factory loads, pull bullets dump powder from a few and recharge with your load and try them.Also might wish to save the powder and bullet form a few decap them and replace with your primers and reload as factory.

You could also dump 10 and start low and work up to your current load as well,compare the rest of them to your load.

All assumeing you can get factory loads that are close to yours ie bullet weight.

BTW you may not have the primers seated deep enough that will give em a flatten look when fired as well. don't think no bobody mentioned that.
 

Latest posts

Back
Top