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Joined: Jun 2007
Posts: 2,342
Campfire Regular
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Campfire Regular
Joined: Jun 2007
Posts: 2,342 |
Its been my experience that with 243 winchesters that 1:10 twisted barrels will shoot lil clusters with 80-85 gr bullets and 1:9 twisted barrels will shoot lil clusters with 100 gr. bullets,they are both fine rounds as I have a couple 243s but I dont own a 6mm Rem but I like any cartridge formed on the ol 7X57 mauser case.............
broken bones broken heart stripped down an torn apart a lil rust but Im still runnin countin miles countin tears twisted roads and shiftin gears year after year its all or nothin Im not home and Im not lost just holdin on 2 what I got...God and Guns
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Joined: Jun 2004
Posts: 4,949
Campfire Tracker
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Campfire Tracker
Joined: Jun 2004
Posts: 4,949 |
If you want to be a little different and get as much as you can out of the Model 7 you can look at the 6mm Crusader that GAP has recently brought out. It pushes the 115gr bullets at 3400fps (needs a 1:8 or faster) and the 100gr at 3550fps. Basicly it is a 6mm with the shoulder pushed out and some of taper removed but still allowing reliable feeding.
Hunt hard, kill clean, waste nothing and offer no apologies.
"In rifle work, group size is of some interest...but it is well to remember that a rifleman does not shoot groups, he shoots shots." Jeff Cooper
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Joined: Dec 2007
Posts: 377
Campfire Member
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Campfire Member
Joined: Dec 2007
Posts: 377 |
I like the handloading potential of the 6mm better. However, there is little room to seat the bullets out very far in my 700. I guess a wyatt's box or something like that could remedy this problem. If i ever rebarrel, it will likely be a 1:8 or 1:9 243
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Joined: Dec 2007
Posts: 10,258
Campfire Outfitter
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Campfire Outfitter
Joined: Dec 2007
Posts: 10,258 |
No you have not mess up. Almost all .243's are 1 in 10 twist which use the same bullets as the 6MM.Rem. Actually this is the correct twist if you want to shoot 100gr. bullets The 1 in 10 twist is just fine for lighter bullets as well. If your new 6mm doesn't shoot 75gr to 100gr.bullets well it isn't the 1 in 10 twist fault. +1
Ed
A person who asks a question is a fool for 5 minutes the person who never asks is a fool forever.
The worst slaves are those that put the chains on themselves.
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Joined: Dec 2002
Posts: 2,887 Likes: 1
Campfire Regular
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Campfire Regular
Joined: Dec 2002
Posts: 2,887 Likes: 1 |
If there is one particular bullet you plan on loading in your 6mm, make up a dummy round that will fit your magazine and send it with your action and barrel to the smith who is fitting them.
I shoot a 6mm on a short 700. The shilen on it is a 12 twist. I shot NBT 70grainers. Shoots very well.
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Joined: Oct 2008
Posts: 7,263
Campfire Tracker
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Campfire Tracker
Joined: Oct 2008
Posts: 7,263 |
If it were me I would look seriously at the 6mm AI the slight velocity increase should make it work with 105 grain bullets and I like the long neck. Besides the cool factor is way up there.
It's funny how some barrels with the same listed twist rate will not handle some bullets but others will. I suspect three things: slightly out of speck or slower twist, a smoother more concentric barrel imparts less wobble so the twist has less work to do, and in the case of the longer bullets testing at 200-300 yards might show they have settled down versus 100 yd. tests.
Hope I didn't just perpetuate additional ballistic mythology.
"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli
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Joined: Jun 2004
Posts: 4,949
Campfire Tracker
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Campfire Tracker
Joined: Jun 2004
Posts: 4,949 |
Dont forget some extra speed will also help with stabilization. I have seen a 1:9 twist 22-250 handle some of the heavies that are very marginal with a 1:9 twist .223 (same twist from same manufactures)
Hunt hard, kill clean, waste nothing and offer no apologies.
"In rifle work, group size is of some interest...but it is well to remember that a rifleman does not shoot groups, he shoots shots." Jeff Cooper
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Joined: Jul 2007
Posts: 15,951 Likes: 15
Campfire Ranger
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Campfire Ranger
Joined: Jul 2007
Posts: 15,951 Likes: 15 |
Owning both a 243 and a 6mm, I prefer the 6mm.
THE CHAIR IS AGAINST THE WALL. The Tikka T3 in .308 Winchester is the Glock 19 of the rifle world. The website is up and running!www.lostriverammocompany.com
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Joined: Feb 2007
Posts: 16,512
Campfire Ranger
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Campfire Ranger
Joined: Feb 2007
Posts: 16,512 |
I prefer the 6mm....BR with 8" twist.
243s and 6mm Rems are both good, 6mm Rem seemed to edge on accuracy.
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