Admittedly a wildcat, but how about furnishing me with some load data on your favorites. Does this combo like big bullets or small, close to the lands, twist rate, number of grooves, etc.

Jim

Jim I shoot a 6/284 that the late Jim Greenawalt smithed for a friend of mine. The rifle is an H&R - Sako roundtop 579. The Hart barrel is 1 in 10 finished at 26 inches, unfortunately it is very tight necked at .266. My favorite load consists of: Winchester turned brass, powder R22, with Federal 210 match primers, and Nosler 85 grain Partitions. Velocity is 3460 ft/secs! Accuracy is on average .6 MOA. Yes I know I omited a charge weight as the custom throating and individual barrels can vary enough to get you in trouble without working up individually. But you knew that. This rifle was mainly set up with a short throat for 68 Berger's and woodchucks, so heavy bullets haven't really been investigated to their fullest (yet.) One last thought is to consider that the 6/284 is roughly equivalent in case volume to a 6mm/06 which is similar to a .240 Weatherby... interpolation is a real time saver.

1:12 if you are going shoot 70 gr or lower bullets, but 1:10 gives you the option of dropping a 95 gr NPT in the case, which is an excellent deer slayer. I have not tried the 85 gr TSX, but I expect they are more of a good thing. I personally use mine for primary coyotes and like the 70 BT's.

Hodgdon has 6/284 data and as 308Sako suggested 240 Weatherby data is a good starting place. But most people settle on 4831 or Re-22. Also as 308Sako mentioned there is not a standardize chamber so take care work up slowly. In my rifle, primers go from nice and curved to flat in about 2 grs.

Saludos...Frank

Jim, there is alot of written loading data on the 6x284 more has to do with what twist you decide on. On my 6x284 has a 28" barrel,.262 neck,1/14 twist barrel set up for the 68gr Berger bullets and velocity is well over 4000fps. I did shoot a 6x284 set up for the LVD bullets didn't get along with that rifle too much, had better luck with the 6br case.
Only reason I never did a 6x284 with a 1/10 twist I much prefer my 1/10 twist 6mmreAI.
The price you pay for speed in the 6x284 is barrel life.
When the barrel is gone on the 6x284 I may do another 6.5x284 I'm getting to like that caliber alittle better than the 6x284. Well good luck.

Tom's right... the 6.5/284 is way more rifle and easier to make shoot well! Those slightly heavier bullets make quite a difference.

I shoot a 6x284 I so far enjoy the 87gr V-maxs. Mine has a 1in 10 twist. So you Boys think my twist is too fast for 70Gr Sierra Blitz Kings?On Reloaders nest a shooter is useing RE#19 for MV of 4,000. Which is best H4831? Or IMR 4831? Current load is 53.5grs of H4350 behind Hornady 87gr V-max seated into the lands.I can get under .4 some times .3s.