Pet 308 loads for Winchester M100 and Remington 742

A 50 calibre bullet, 223 brass and a pound of Retumbo.... Seriously I'm being an A$$. But seeing as you didn't include the calibre even I couldn't resist.... Buy a reliadung book, study it, buy some brass, projectiles, powder, primers and work up loads. It's the only way to be safe and sure as every rifle is a but different.
 
My Dad's Win 100 hated 165-180gr bullets and patterned them like a shotgun. Switched to 150gr and 1/2" groups.Your mileage may vary.
 
In a bolt action 308, I would use 4895 speed powder for 150s and 4350ish powder for 180s.

For a semi I would use the faster powder (3031, H335, 748, 4895 RL15, Varget) for everything. This helps the gas system cope.

Like any other rifle, it will do better with some bullets than others. Personally, I like to develop a 180 gr load and use that for everything. If you have a buddy that loads, see if you can beg 10 180 gr bullets of several types/brands. This would save you buying a whole box and discovering the rifle does not like them.

Load 5 of each at the Start load for your powder, and the other 5 at +2 gr. Shoot these for groups, letting the rifle cool, and paying close attention to how close the first 3 group.

If any of these 180s groups at under 2" at 100 yards, you have a hunting load.
 
In a bolt action 308, I would use 4895 speed powder for 150s and 4350ish powder for 180s.

For a semi I would use the faster powder (3031, H335, 748, 4895 RL15, Varget) for everything. This helps the gas system cope.

Like any other rifle, it will do better with some bullets than others. Personally, I like to develop a 180 gr load and use that for everything. If you have a buddy that loads, see if you can beg 10 180 gr bullets of several types/brands. This would save you buying a whole box and discovering the rifle does not like them.

Load 5 of each at the Start load for your powder, and the other 5 at +2 gr. Shoot these for groups, letting the rifle cool, and paying close attention to how close the first 3 group.

If any of these 180s groups at under 2" at 100 yards, you have a hunting load.

Thanks, sounds like good advice. I actually load myself. Just 220 Swift right now, years ago I probably loaded 6 to 8 thousand rounds per year of .38 wadcutter for my S&W M52, along with some 257 Roberts and .44 magnum. I think I'll be doing some .308 very soon.
 
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