I am loading for a Zoli o/u 7x65 R. I have loaded 150 noslers with 4350 powder at max. and the gun shoots 5 in. I then shot 139 grn. at max. and the gun shot 8 in. I loaded the min. load 4350 and a 139 grn. and the gun shot 5 in.
I tried 4831 min. to max. with 175,160,150 and 139 and the gun shot 8 in.
I always used more speed or a lighter bullet to get the gun to shoot closer.

I have 3031, 4064, 4320 powder.

This makes no sense.

Any ideas?