rth1959rth
New member
Anybody ever experience severe vertical stringing of groups when using Win 760 powder?
I ran out of H4895 for my 30-06 but had almost a pound of Win 760. Loaded 56-58 grains of 760,150 gr. Hornady Interlock bullets, Win std. primer, in neck sized Win cases. Groups were strung vertically 2-3 inches in every instance. Swapped bullets to 150 gr Sierra Pro Hunter and still severe vertical stringing. Changed to Fed. primers - same results. Shot almost 100 rounds and never did get anything much less than 2".
Groups were 3 shot groups with aprox 5 minutes between shots.
Found some H4895 this weekend at the gun show and 50 grains behind the Sierra 150 Pro Hunter = .75".
I've seen groups change when swapping powders, but never seen anything this severe. Should I have used magnum primers? Any other suggestions. Normally, I have good results with Winchester powder and love how well it meters, but this has me stumped.
I ran out of H4895 for my 30-06 but had almost a pound of Win 760. Loaded 56-58 grains of 760,150 gr. Hornady Interlock bullets, Win std. primer, in neck sized Win cases. Groups were strung vertically 2-3 inches in every instance. Swapped bullets to 150 gr Sierra Pro Hunter and still severe vertical stringing. Changed to Fed. primers - same results. Shot almost 100 rounds and never did get anything much less than 2".
Groups were 3 shot groups with aprox 5 minutes between shots.
Found some H4895 this weekend at the gun show and 50 grains behind the Sierra 150 Pro Hunter = .75".
I've seen groups change when swapping powders, but never seen anything this severe. Should I have used magnum primers? Any other suggestions. Normally, I have good results with Winchester powder and love how well it meters, but this has me stumped.
