marlin 1894 micro grove cast bullet p.o.i.

[rp85]

hello;

anyone can explain why my cast bullets, 44 mag, 258 grain swc, sized to
.431" would shoot @3" left where jacketed bullet hit??

thanks for an input.

rp

[uscra112]

At what range?

[rp85]

100 yards

[Wolfer]

I don't find it unusual for some guns to shoot to different POI when changing bullets even when both are jacketed much less when one is and one isn't.

[btroj]

Why would you expect any two loads to have the same point of impact at 100 yards?
I can vary impact point by 12 or more inches with just a small powder charge difference.

The fact they are within 3 inches is actually quite nice.

[popper]

If you are right-handed, i would suspect recoil, if it just goes left. I would also expect a drop in POI unless you have the same fps on CB and J-B.

[madsenshooter]

I am often amazed by the change of POI from one boolit to another, even though the weight of the boolit and the rest of the load are similar. Just today I was shooting loads with the NOE311365, a spitzer and the Eagan MX2-30H, a conical boolit. Probably a 12" difference in the point of impact between the two despite the weights being close, and the rest of the load exactly the same.

[stubshaft]

Last Sunday I was trying to work up some new loads for my 7BR and the difference between two different alloys changed the POI by 4".

[wmitty]

Vibration of barrel: think of a water hose whipping back and forth as it sprays your wife when she turned it on without grabbing it first. Not a great analogy, I know... but it was first thing came to mind. Seriously, end of barrel is moving in a orbital, or possibly horizontal path due to vibration. Where the muzzle is pointing at time of boolet exit is very likely to be different from one load to another.