So I recently had a new 26" Shillen barrel installed on my old model 70 in 7mm Rem Mag.
I am currently about 50 rounds down the tube shooting and breaking in as the mfg suggests.
I have begun trying to shoot groups with handloads and it is teasing me.
I shoot five shot groups, not letting the barrel heat up too much, and I will get a good group with part of the loads and then get one or two that goes where it shouldn't.
I am loading H1000 and 160 Accubonds, and IMR7828 and 160 Partitions. 66 grains of IMR7828 did not shoot well at all (2.5" group), but 65 grains was almost a one holer with three of the shots, and two laying out of the group an inch or so.
H1000 is doing the same thing, really good one day with a load and the next day it shoots really bad with the same load. Same lot of powder, same bullet lot etc.
Right now, I am loaded .02 off the lands according to a stoney point gauge.
Any ideas?
FH
