Ask Uncle Nick

Maximum range of shot pellets varies with pellet mass and velocity.

The calibre would be either .270 or .300 Weatherby Magnum.

Never use a burning rate chart for developing handloads.

If I were you, I'd forget about a .338 wildcat on the 8mm Rem. Mag. case.

The headspace is easily corrected by installing a longer bolt head.

The .22 Nosler is capable of driving 60gn bullets at 3250fps.

But the .30-06 offers an even bigger advantage with 180gn bullets to be used on big game.

I can assure you that the Mossberg action is plenty strong enough to handle the 33 Nosler.

You don't say if you are shooting factory ammo or a handload?

The bullet drops about a foot at 200 yds, where retained energy has plummeted to about 600 ft/lbs.

You might think about a .223 Rem. as Winchester loads a 64gn bullet and OSA loads a 63gn bullet.

I recommend sighting-in 3 inches high at 100 yds for a 250yd. zero and drop of 4 inches at 300.

Parallax can be detected by placing crosswires on the centre of a target at say100 yards, and while looking through the scope, moving your head from side to side.

Of the many forces that affect accuracy, barrel vibration is probably foremost.

Give those varmints hell!