Lrpv,
Do yourself a favor and try Ramshot Magnum as Johnmeyer mentioned earlier.
It has worked well for me as also. After a few hundred rounds I'm still using the same oal and getting great accuracy.I have not had to chase the lands at all.
I'm getting 3395fps with 107 smk's with an es of 8.
It is a hot load but no heavy bolt lift or case head expansion.Primer pockets do get looser in 3 firings but hold primers no problem.
Shoots 1.25-1.5" groups at 565yds and 4-5" at 1000yds.
And I'm not a competition shooter. Just a hunter.
In fact I shot an antelope at 750yds and dropped it on the spot.
It is very temp stable as proven by a Barnes bullet study and very consistent.
Even though it is not the most popular powder ,it works great in the big 6mm's
Start at 54 gr and work up until you get the velocity and es you need.
Try .010 and .015 off of lands with the 107smk's initially.
This should end your frustration.
Do yourself a favor and try Ramshot Magnum as Johnmeyer mentioned earlier.
It has worked well for me as also. After a few hundred rounds I'm still using the same oal and getting great accuracy.I have not had to chase the lands at all.
I'm getting 3395fps with 107 smk's with an es of 8.
It is a hot load but no heavy bolt lift or case head expansion.Primer pockets do get looser in 3 firings but hold primers no problem.
Shoots 1.25-1.5" groups at 565yds and 4-5" at 1000yds.
And I'm not a competition shooter. Just a hunter.
In fact I shot an antelope at 750yds and dropped it on the spot.
It is very temp stable as proven by a Barnes bullet study and very consistent.
Even though it is not the most popular powder ,it works great in the big 6mm's
Start at 54 gr and work up until you get the velocity and es you need.
Try .010 and .015 off of lands with the 107smk's initially.
This should end your frustration.