Originally Posted by cross
Thanks for the information. I've considered the 7mm-300 Wby because it's far more standard than the 7mm-300 Win. but I have no experience with Weatherby cartridges so I kind of look at them the same way that I do a Macintosh. I have several questions about these?
Are the Weatherbys as accurate?
Are the case bodies roughly the same diameter so that they'll feed through the magazine without altering the rails?
Are the lengths of the cartridges roughly the same as the 300 Winchester so that I can seat the bullets out where they need to be instead of jammed into the cases?
How expensive is brass and does it last as long as other brass?
Do the double radius shoulders cause any trouble when sizing the brass?
Are Weatherbys accurate? As much as any other factory rifle. My 40+ year old 7mm Weatherby with who knows how many rounds down the barrel still shoots around 1 MOA with Soft Point hunting loads. My 30-378 Weatherby get less the 3/4 MOA. I had a .243 Vanguard "youth" model that shot 1/2 MOA (unless I f*&#ed up). Weatherby even has a whole line of Vanguards called SubMOA that guarentee it when using factory Weatherby ammo.
300 win mag - body dia .513 - c.o.a.l. 3.340
7 wthby mag - body dia .512 - c.o.a.l. 3.360
300 wthby mag - body dia .518 - c.o.a.l. 3.560
If you buy an original Weatherby in 7mm, you won't have to worry about jamming the bullet into the lands. Most Weatherbys are very long in the throat. If you go with a 7-300, just make sure the reamer is to the dimensions you want.
You can buy either Norma or Weatherby stamped brass, but, Weatherby brass is made by Norma Precision anyway. As you know, Norma makes argueably the best brass. Midway has 300 Wthby Norma brass for $120/100, Rem for $60/100 and Hornady $94/100 and has 'Quality Cartridge' brand 7-300 Wthby for $45/20. If you want some 7 Wthby brass let me know. I have a bunch of once fired.
As far as the double radius and sizing, I assume you mean necking down the 300 to 7mm. I've never heard of it causing any problems. I have had no prblems with either neck or full length sizing my brass for reloading, but like any belted magnums, expect it to eventualy form a bulge above the belt.
Does this help?