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Shooting & Reloading - Mausers, Big Bores and others >> Big Bore Rifles

mauserand9mm
.400 member

Reged: 03/09/09
Posts: 1070
Loc: Queensland, Australia

Re: what's a good cartridge for group 3 Big Game Rifle?
29/06/10 09:12 PM

450_Ackley, Actually, I suspect that all of the CZ550 magnums have long throats (I haven't checked mine though), and this may explain why I can't get my 375 to shoot the lighter projectiles accurately - they are just too far away from the rifling at the start and must misalign. The heavier (300 and 350gns) round nose shoot okay. 220gns will do 2-3 MOA @ 100 yards and the heavier ones around 1 1/4 MOA (best group 3/4 MOA @ 100 yards and 1 MOA @ 200 yards). I know 3 inches @ 100 yards is plenty of accuracy for larger game, it's just that the model 602 375H&H I had many years ago would do MOA with everything, so I had high expectations. Besides, there is no reason the larger calibres shouldn't be accurate.

And this would also explain the dramas I had with reduced loads in my CZ550 458WM (with cast projectiles). I got about 3 projectiles stuck at the start of the rifling (on different occasions of course), and those hard cast projectiles are very hard to knock out. Even a primer in an empty case will jam a lead projectile solid. With so much freebore, initial ignition was unreliable with a reduced charge (ie lots of empty space in the case).

Anyway, I've highjacked my own thread.

So either 500 NE in a single shot or 500 Jeffrey in a bolt action - I've got some consideration to do (and checking for actions out there).

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Subject	Posted by	Posted on
what's a good cartridge for group 3 Big Game Rifle?	mauserand9mm	28/06/10 05:12 PM
Re: what's a good cartridge for group 3 Big Game Rifle?	alexbeer	28/06/10 06:00 PM
Re: what's a good cartridge for group 3 Big Game Rifle?	CHAPUISARMES	28/06/10 06:31 PM
Re: what's a good cartridge for group 3 Big Game Rifle?	Con	28/06/10 07:04 PM
Re: what's a good cartridge for group 3 Big Game Rifle?	alexbeer	28/06/10 10:55 PM
Re: what's a good cartridge for group 3 Big Game Rifle?	Huvius	28/06/10 11:42 PM
Re: what's a good cartridge for group 3 Big Game Rifle?	xausa	29/06/10 01:00 AM
Re: what's a good cartridge for group 3 Big Game Rifle? DELETED	grandveneur	29/06/10 01:43 AM
Re: what's a good cartridge for group 3 Big Game Rifle?	9dot3x74R	29/06/10 07:34 AM
Re: what's a good cartridge for group 3 Big Game Rifle?	mauserand9mm	29/06/10 08:52 AM
Re: what's a good cartridge for group 3 Big Game Rifle?	Con	29/06/10 10:40 AM
Re: what's a good cartridge for group 3 Big Game Rifle?	450_Ackley	29/06/10 03:51 PM
Re: what's a good cartridge for group 3 Big Game Rifle?	Con	29/06/10 04:50 PM
Re: what's a good cartridge for group 3 Big Game Rifle?	mauserand9mm	29/06/10 09:12 PM
Re: what's a good cartridge for group 3 Big Game Rifle?	450_Ackley	29/06/10 09:40 PM
Re: what's a good cartridge for group 3 Big Game Rifle?	RigbyUser	15/08/10 05:45 PM
Re: what's a good cartridge for group 3 Big Game Rifle?	450_Ackley	29/06/10 07:27 AM
Re: what's a good cartridge for group 3 Big Game Rifle?	NitroX	28/06/10 07:55 PM

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