Hello,
Just wanted to circle back on this with my results from the IMR-4350.
This shoot was only for velocity at 25yards, but grouping overall was about 2.5 MOA. One shot per charge. Did not get to stiff bolt or flattened primers.
Cartridge: 358 Norma Mag
Action: Mauser
Barrel Mfg: Unknown...
Thanks @DrMike and @JD338. I saw some of the older QL posts for 358 NM for the some 250gr 358 NM loads. I have some IMR-4895, as well as Staball6.5 and Win 760, so I think that gives me enough options to work with for now.
Hello, wanted to see if anyone could run a QL for me for a 358 Norma Mag with a 23.75” barrel and 1:12 twist for a 254gr Hammer Hunter. Have some load data from various manuals and was trying IMR-4350, but it’s really compressed without getting to max loads with the smallest charge range for a...
I’ve seen some on Gunbroker reformed from 308. There’s a guy on Marlin Owners that does some modified 336 rifles to run with higher pressure and I think I read that part of that was using reformed 308 brass because it is a bit thicker and does better with the higher pressure. I haven’t had any...
Got the rifle back and chamber is good. The fired case from the gunsmith measures 1.740 on the comparator. So I guess that settles it. The chamber is just tight and new cases will need to be bumped backed a bit to fit if they don’t out if the box. Thanks again to all who provided insight.
Quick update on the measurements. Thank you to those pointing out that it’s a comparator, and not for measuring headspace. I missed the fact that the bushing is at 0.420 and the datum line in SAAMI is at 0.4450. That means with the 35 degree angle, my point of measure (roughly) would have been...
I have some 308 Winchester and 270 Winchester Nosler Custom/Premium brass as well, so I measured those as a sanity check. Both were well under SAAMI spec out of the box. Also checked some Nosler Trophy factory cartridges in 308 Win. and 300 Win Mag. Both were also under SAAMI too. My RCBS die...
I picked up a couple of boxes of 300 WSM Custom Brass the other day. When working up my initial COAL, I tried an unprimed round just to see how it would feed. The bolt would not close all the way. This is on a Tikka T3. I pulled the projectile off and tried again, still no luck. I used a...