The 22 creedmoor thread

[ACHILLES]

Sorry, I guess I was asking about pressure and trying to read primers. I wasn't very clear.

Primers are not always the best indicators of pressure in stout brass like Peterson. Also the 68gr hpbt will have more bearing surface than the 69eldvt and should pressure out with less powder. Another thing to consider Hornady load data is tested with Hornady brass which has slightly more capacity than Peterson. Generally to run the same bullet/powder at the same velocity I will have to run 1gr less in peterson brass than Hornady. Looking at your velocity’s alone you’re probably about as high as you'd want to go. Take your fired brass resize it and get a case head measurement just above the extractor cut. Work your way up measuring from the lowest to highest charged cases and write them down. You will notice most will be the same which should be the .470-.471 range depending on your chamber specs. Once you get around 47gr it may go up half a thou, to .4715-.472 showing you the pressure has increased significantly. It may not be those exact numbers depending on your chamber and calipers used. But start with the lower charges to find a base measurement then watch for the base measurement to grow as you get into the higher charges. If for some reason your base measurement hasn’t grown near the top. Load up 47.5 shoot, size, and measure. And if you want when you drop down and shoot to find accuracy. Once you’ve found it. Shoot and reload one case with that charge. If it’s toast and can’t be resized after 2-3firings your obviously running higher pressures.

 

[dårlig jeger]

Thank you all for the input. I am new to reloading and couldn't tell if I was missing something.

I will try the case measurements that @ACHILLES outlined above. That is a cool thing to learn.

I'm thinking I'll load up a bunch in the 45-grain range and see how they shoot.