new 6mm?

[lloydsmale]

all i can post is my own experience. My 6mm is a rem classic with a 22 inch barrel and 3000 is it with a 100 without primers flattening. Ive seen 3300 with my 240 mark v with a 24 inch barrel. Accuracy with both is one inch for 5 shots at a 100 yards. What else I will say is when shooting deer with both at 400 plus yards the 240 does seem to hit harder. Bottom line though in my opinion is that when the range is out past 400 a bigger caliber then the 6mms does a much better job. Yes cases for the 240 are tough to find and expensive. But they are available. I dont worry about the cost of 5 grains of powder. Its trivial in the big picture. Like i said i like both and use both but think they both have there limits. Like i said in my previous post the 6mmo6 might be the best bet. It will do what the weatherby will and brass is everywhere. As to velocitys posted in loading manuals i seriously wish theyd quit publishing them as there never accurate. I go by my own guns and my own chrongraph and in my experience the 240 has at least 200 fps more in it and like i said if thats trivial then the 7mag isnt any better then the 280 and 300 win is no better then an o6. Pretty tough for me to buy into a round being just as fast loaded to the same pressure as the same caliber with 6 more grains of powder. Maybe back when 4350 was considered THE powder for a mag round. Now we have powders available that make use of that extra capasity. I guess I have to wonder why some guys insist on tryin to make a standard round into a mag. If you want a 6mm that will honestly do 3100 with a 100 grain bullet then buy one as they are avialable. The 6mm is a good honest 300 yard deer round and i dont try to make it any more then what it is.

ponder this:

240 WBY cases are about as common as my ex wife's smile in court! The 240 will drive a 105 grain Amax to about 3250 fps max. The standard 6mm will drive the same bullet to about 3100 fps, but with about five grains less powder. Yet the 6mmAI will add another 150fps to the 3100fps and still be safe. But the other thing is that the barrel life is good. Looking thru three reloading manuals I see less than 100fps difference, but most often I find the 6mm on the anemic side. It's a true 65K psi round, and you gotta get that data. At 63K psi in the 6mm there's just not a serious lot of difference. Speer says it will do 3145 fps with a 105 grain bullet, and that's about right. I don't know how they managed that from a 22" barrel but they did. A 24" or 26" barrel will easily do that.

Still the real issue here is hitting something at five hundred yards. The 6mm will, and it's a maybe or maybe not with the 240 and all it's free bore
gary

 

[lloydsmale]

heres some from my records dont think your going to get a 6mm even close
100gn Sierra
55gn H 4831 3312
54gn Rel 19 3404
52gn Rel 22 3218
53gn Rel 22 3382

 

[Gunpoor]

I could get 2975 ft/sec from my 22" 243Win with 100 grain Rem Corlokt bullet over 40 grains of IMR 4350, and with all other things being equal I think a 6mmRem will run faster because of more case capacity. My Remington model 600 in 6mmRem only has an 18" tube and that kind of limits the muzzle velocity, and I don't know if I have ran it over a chronograph. I think if longer shots are going to be the norm on medium/large game animals that a larger bullet diameter would be better. The guy on the TV show, Predator Quest, was shooting a 204 Ruger while coyote hunting and couldn't get a dog to come in closer than 400 yds., so he brought out his 300Wby and reached out and touched him. Is a 300 magnum necessary to shoot that far? No, but it got the job done.

 

[Trickymissfit]

I could get 2975 ft/sec from my 22" 243Win with 100 grain Rem Corlokt bullet over 40 grains of IMR 4350, and with all other things being equal I think a 6mmRem will run faster because of more case capacity. My Remington model 600 in 6mmRem only has an 18" tube and that kind of limits the muzzle velocity, and I don't know if I have ran it over a chronograph. I think if longer shots are going to be the norm on medium/large game animals that a larger bullet diameter would be better. The guy on the TV show, Predator Quest, was shooting a 204 Ruger while coyote hunting and couldn't get a dog to come in closer than 400 yds., so he brought out his 300Wby and reached out and touched him. Is a 300 magnum necessary to shoot that far? No, but it got the job done.

If memory serves me right, I've tagged about six or eight coyotes past 500 yards with the 6mm, but used 87 grain bullets and Berger 88's. The longest was in the 650 yard area. Later I learned to call them in much closer. At 3300fps muzzle velocity the bullet will have almost 900 ft. lb. of energy, and drop about 33.5 inches with a 200 yard zero at 500 yards. That's about 1.1" high at 100 yards. I've played with a + 5" zero point, and even a +6" zero point, and they were more trouble than they were worth. Plus I don't estimate yardages as well as I did when I was younger. So I kinda like the 400 to 500 yard cut off points. A 30lb. coyote is not exactly a big animal, and when your looking at 400 to 500 yards it's really hard for me to judge the hold over anymore. With a 200 yard zero it's pretty much point blank out to 300 yards. A 300 yard zero would be much better out to 400 yards, but once again the hold over becomes the issue at 500 yards. I know I've done it several times, but now days it's insane. Plus my favorite bullet is 80 grains, and I limit it to 300 yards n the 6mm. My 6/250 will do 3000fps with a 105 grain Amax or the 107 Sierra, and that's a different ball game.
gary

 

[TH]

I also shoot the 107 Sierra 3400 fps out of the 6-284. My load is 52 grns of R-22. Im using a 32 inch barrel. Straight 1.450 bug hole groups I usually average 800 rounds per barrel.