6mm calibers

[dan belisle]

The 6mm Mach IV was made in two versions (that I've seen, maybe more that I haven't). Ross Seyfried did the original write ups and load work on it. Basically, the 7 Rem Mag case necked down to 6mm, or the same case improved (shoulder forward and tapered at 40 degrees, minimul body taper, then necked down to 6mm). The load data I've seen hasn't shown much improvemt with the improved case over just the necked down case. I suspect you're reaching the limts of overbore again until someone makes even slower powders. I started one of these years ago (after reading the articles, I'm a slave to the media, what can I say?), and still have all the parts laying about but never finished it. Yet. - dan

 

[dan belisle]

Because a.243 Win will launch a factory 55 gr @ over 4000 fps. A handloaded Barnes 58 will match it easily in speed, have a trajectory of maybe 1.25" high at 100 yds and still only a couple of inches low at 300 without the wind drift of the "tiny's, read .223-204-224's). And you'll still have a great deer/antelope/wolf/whatever gun. The man said "coyotes" I think. (But between you and me, I'm looking for the hottest .257 I can find/build. I want an 80+ grainer at 4000+ fps. e=mc2)

Try a 257 STW, and ground charcoal for powder. - dan

 

[mylesrom]

You can push the 257 with a 75gr v-max to 3900+.....

I think that would be enough for coyotes....

 

[altagunguy]

Three factory cartridges that have been missed are the .244 H+H, and the 2 6.17's by Lazzeroni. All of these are worth taking a look at. If I ever buy another 6mm it will probably be a Weatherby.

 

[dan belisle]

The 240 Wby is a 6mm-06 with a belt and freebore. Save your money. - dan

 

[RR]

Oh no I just mailed my action off to get my 240 Weatherby built

Rich

 

[phreddy]

Do some research (online) on the Carl Gustave 6.5x55 Swede. Pretty much speaks for itself. Not all that expensive and worth one hell of a lot more.

 

[dan belisle]

Oh no I just mailed my action off to get my 240 Weatherby built

Rich

LOL, well, I'm not saying the 240 is a bad thing, but it's basically a 6mm-06. I shoot a 240 Gibbs as well, which is a little quicker then The Wby 6, but not much. if you like it and it works for you, it's all good. - dan

 

[Pickles]

Three factory cartridges that have been missed are the .244 H+H, and the 2 6.17's by Lazzeroni. All of these are worth taking a look at. If I ever buy another 6mm it will probably be a Weatherby.

244 H&H is a factory chambering?

I'm going to have a second look at the Remington catalogue and see if I can get one!

 

[dan belisle]

244 hasn't been a factory chambering for a while, but it used to be. You still see used rifles in this once in a while. - dan