L Cazador Report post Posted Monday at 07:43 PM 5 hours ago, BeardownAZ said: Got the brand new Norma brass, it chambers great. Like factory ammo. I'll load these and then see what happens next but I don't for see the problem going away once I go to resize the once fired brass. Next is small base dies. After that, not sure. And still not sure what checking the headspace will do. Don't know one single person that has this caliber unfortunately. Sticking to common calibers from now on, lol The key is find a load under max that shoots well. The SAMMI dimension at the case head above the extractor groove is .555". Don't exceed that and set your sizing die to bump shoulder .003-.004". This amount of bump is the headspace needed in a hunting cartridge for quick and easy chambering of repeat shots. You will need a Hornady headspace gauge to set your sizing die for the correct bump (shoulder set back). Pic of Hornady headspace gauge and 270WSM SAMMI dimensions. So for a .003" bump on the cartridge in the picture I would set my die to dimension of 1.182". Share this post Link to post Share on other sites
MMACFIVE Report post Posted Monday at 10:02 PM On 11/30/2024 at 7:44 AM, MMACFIVE said: Your chamber is the best headspace measurement you've got. Don't worry about it, buying a headspace kit will not help you in anyway with this. BTW the very first place brass chamber easy after resizing is almost always near that magical 0.0020" shoulder bump I would expect new brass to chamber easily. But after a stout load or 2 I'll bet it is stiff again. Unfortunately Norma is very soft brass and will exceed its elastic limits faster than most brass. Winchester and Lapua brass will be your friend. You need a SB die. Removing 0.050" off of your resizing die would likely solve your problem but I don't recommend it because of shoulder set back. Good luck. 1 Share this post Link to post Share on other sites
