Re: barrel weight and accuracy problems
There are a great many Palma rifles built on 30" tubes fitted to Remingtons that raise all kinds of hell with the X ring at 1000 yards.
You have a cartridge capable of tremendous accuracy so you can eliminate that assuming your hand load procedure is solid.
There are a number of things that can cause elevation, flyers, and those annoying random "orphan" shots that don't want to mingle with the rest of the holes.
Start looking for a binding guard screw, a bolt handle touching, poor fitting bolt shroud, loose sights/scope, bad sights/scope, a cracked stock, a loose pillar, a bad/dinged crown, a worn out striker spring, crap bedding job, poor action machine work, and last but not least (drum roll please. . .) IS the barrel screwed on tight?