What degree of change in windage or elevation is considered normal for 308 Winchester class of ammunition when sporting ammunition bullet weights are changed from approximately 150 to 200 grains? The question pertains to likelihood of using the same point of aim for acceptable "hunting" accuracy up to 150 yards.

I’d bet at least an inch of elevation.

Any where from dam they both shoot tiny little groups together.

To I can not hit the broad side of a barn using one over the other.

Just go shoot the rifle and find out.

That's been my experience too. I regularly sight in rifles for customers. Sometimes I will take up to 4 brands of ammo in different bullet styles and weights. They can print all over the place, and not just vertically. I will say that the most consistent are old cup and core bullets. Pick the same design in the two bullet weights. Don't mix Spire Point, Round Nosed, or Ballistic tip.

quote:

Originally posted by p dog shooter:
Any where from dam they both shoot tiny little groups together.

To I can not hit the broad side of a barn using one over the other.

Just go shoot the rifle and find out.

150 yards is well within Point Blank Range for any cartridge in the 308 category and faster. And for many others too.

quote:

Originally posted by dpcd:
150 yards is well within Point Blank Range for any cartridge in the 308 category and faster. And for many others too.

30-30 too

quote:

Originally posted by dpcd:
150 yards is well within Point Blank Range for any cartridge in the 308 category and faster. And for many others too.

That doesn't mean they well shoot to the same point of aim. Or group together.

Go to the range and test your rifle Thats the only real way to know, they rest is guess and by gosh, not fact..

Counterintuitively, the slower bullet often prints higher on the target. This is due to a number of factors, among which is longer barrel time, thus the recoil of the rifle has time to lift the muzzle slightly, therefore changing the point of impact. This is usually minimal with rifles, but significant and obvious with handguns.

However, muzzle oscillations can counter or enhance differences in velocities, so it is impossible to accurately predict just how much differently two different weights (or even two bullets of the same weight) will group.

As has been suggested, the only way to know is to the shoot groups with the rifle with the exact two loads in question and see what happens.