If I zero my scoped inline .50 cal - due to the fact that a scope is now necessary due to old eyes/trifocals and etc. - how will the point of impact vary with different loads/bullets. Any one hav experience/ tables for this question.
Thanks in advance for any help.

You might find some info and charts out there but the only sure way to know what your rifle is doing is to shoot it with the different loads.

doc623,

Strut is correct in the fact that you can expect different guns to act a little differently. All I can offer you is what works with my rifle and maybe you can use that for a starting point. I shoot a Knight USAK in-line .50cal with a 22" 1:28"-twisted barrel.

In order to keep my gun zeroed to the same spot, I've found that:

1) A change of 50gr on bullet size requires a 10 to 15gr change in powder load. For example, if I zero a 350gr sabot at 100yds with a load of 105gr of Pyro RS - if I drop down to a 300gr bullet, then a reduction to 90gr of RS keeps my shots to within less than 1 MOA on the target. If using the new Triple 7 powder, those loads would be 90gr for the 350gr sabot and 80gr for the 300gr sabot to hit the same groups.

2) When zeroed at 50yds, I find that an additional 5gr of powder is typically required to hit the same zero @ 100yds. For an example, that 350gr sabot hits the "X" at 50yds with 100gr of RS and upping it to 105gr hits the same "X" (within 1 MOA) at 100yds. So if your sighted-in at 100yds and end up hunting an area where the longest shot possible is about 50 to 60yds, just drop your load 5gr and you won't have to worry about aiming higher or lower (or adjusting your scope) in order to put the bullet right where you want it.


"Every moving thing that liveth, I give unto you as meat" (Gen 9:3)

Trust God..........but keep your powder dry!