Decided to shoot my 700 BDL in 300 RUM. It was NIB. Picked up some 180 GMX's and looked on Hodgdon's site, I looked at their data for the 180 Sierra and did not give it a thought about the GMX being a Mono bullet. They list H4831 at 84-89 Grains. I never see the need to max things out so I loaded up some at 84 and some at 85 grains. The 84 grain loads shot the first five rounds out of this gun into right at an inch. I shot the 85's just for fun and it opened up to about 2". Today, I happened to look and see that Hodgdon lists the same powder for the 180 Grain TTSX at 77-82......
Sooo, am I over max with the GMX? I called Hornady and they were less than helpful telling me they do not list that bullet with H4831.
I did not see any pressure signs but honestly was not looking for them.
