cjohnson3006

I just purchased some 90gr. Nosler Ballistic tips to load in my .243 and cannot find any load data.IMR site lists 43gr. IMR 4350 as max charge, but cannot find C.O.L. Thanks

eldeguello

C.O.L. of HP rifle roundsis not too critical as far as pressures are concerned. Believe it or not, thebullet is already 4"-6" up the bore before peak pressures occur anyway.

Set the C.O.L. for your gun at a length where the bullet is about 1/16" shy of touching the origin of the rifling, OR to a length that permits the rounds to function in the magazine of your rifle.

dbblung

I use the same powder and charge 43gr of IMR 4350. I loadthe Speer 90 gr Hot-Cor bullet though, with a 2.650 C.O.L., groups well for me.

cjohnson3006

I put a bullet on an empty case and chambered in gun closing the bolt. When I removed it, it measured 2.810. I loaded the case with 42.5gr. IMR 4350 and set the C.O.L at 2.700. I will shoot a few rounds this weekend and see how it goes.