Still struggling -
I know this is worthless without pics or velocity but here we go...
I had zero luck with the RL26 at various charges and seating depths. It just won't go in my rifle.
Switched to H4831SC. Shooting three shot groups looking for the best group or a couple of groups that are close to each other in size. While shooting I look for any pressure signs - bolt lift, primers, brass flow into the ejector. Then, I will load at that charge and put the magneto speed on.
Starting at 58.2 I worked up in .2 increments to Hodgdon Max of 59 (for the Accubond). Starting charge was about 1.5" and the next two groups open up to 2" plus. The 58.8 was back down to 1.5".
The 59.0 group was .75 inches - I've done it!
Ahh, but wait. The second shot ejected a split case. Zero pressure signs on the 1st and final shot. The head of the case was fine on all three cases.
New Sig brass run over a mandrel, 59.0 H4831sc, Rem 9-1/2 primers, 200 partition seated off the lands.
Now what?
Load more at 59.0 and shoot with the chronograph to verify velocity/pressure?
Maybe the case was split and I just didn't notice?
Bad case from the factory?
??
