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Joined: Jun 2004
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Campfire Regular
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OP
Campfire Regular
Joined: Jun 2004
Posts: 1,801 |
I am having a 23" barrel made for a deer rifle. It will either be in .243 or 6mm. In factory loads/handloads does the 6mm really get 100 fps faster. Or only in some cases. If I have it made in .243 there is the advantage of easy access to factory loads (I am not reloading as much as I once was). If the 6mm easily av 100 fps faster that is a deal breaker for me.
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Joined: Dec 2010
Posts: 19,310 Likes: 23
Campfire Ranger
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Campfire Ranger
Joined: Dec 2010
Posts: 19,310 Likes: 23 |
I am having a 23" barrel made for a deer rifle. It will either be in .243 or 6mm. In factory loads/handloads does the 6mm really get 100 fps faster. Or only in some cases. If I have it made in .243 there is the advantage of easy access to factory loads (I am not reloading as much as I once was). If the 6mm easily av 100 fps faster that is a deal breaker for me. A hundred fps will never be detectable by you or any critter you may shoot.
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Joined: Oct 2002
Posts: 96,121 Likes: 1
Campfire Oracle
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Campfire Oracle
Joined: Oct 2002
Posts: 96,121 Likes: 1 |
243, much more skookum a fit and with today's bullets a few fps means not a damn thing.
Course you could go 243AI and have the same as a 6mm, with the same skookum fit.
I'm assuming you are twisting it properly?
"Dear Lord, save me from Your followers"
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Joined: Mar 2005
Posts: 3,722
Campfire Tracker
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Campfire Tracker
Joined: Mar 2005
Posts: 3,722 |
If on a short action, 243.
WAR EAGLE!
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Joined: Jun 2004
Posts: 1,801
Campfire Regular
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OP
Campfire Regular
Joined: Jun 2004
Posts: 1,801 |
!-9" twist. AI would make factory loads a tad weak and force me to reload all the time. 100 fps is the difference between a .308/30-06 that so many people argue over. Encore barrel so action length means nothing.
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Joined: Jun 2004
Posts: 1,801
Campfire Regular
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OP
Campfire Regular
Joined: Jun 2004
Posts: 1,801 |
95 gr CT Ballistic tips, VLDs, maybe 85 gr TTSX.
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Joined: Nov 2004
Posts: 5,499
Campfire Tracker
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Campfire Tracker
Joined: Nov 2004
Posts: 5,499 |
Currently have both and the 6mm is about a 100 fps faster than the 243. I would keep the 6 over the 243 if I had to dump one, which I may do in the future. Works just fine in a short action with 95 Ballistic Tips.
There is no way to coexist no matter how many bumper stickers there are on Subaru bumpers!
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Joined: Aug 2010
Posts: 48,264 Likes: 30
Campfire 'Bwana
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Campfire 'Bwana
Joined: Aug 2010
Posts: 48,264 Likes: 30 |
I try to stick with the basics, they do so well. Nothing fancy mind you, just plain jane will get it done with style. You want to see an animal drop right now? Shoot him in the ear hole. BSA MAGA
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Joined: Nov 2010
Posts: 37,224 Likes: 9
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2010
Posts: 37,224 Likes: 9 |
Not as popular as the .243, the 6mm Rem, IMHO, is a better round. One can get some great performance with RL-17.
DF
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Joined: Mar 2010
Posts: 10,896
Campfire Outfitter
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Campfire Outfitter
Joined: Mar 2010
Posts: 10,896 |
Yep it's a hummer out of my #1 with 85 gr TSX's
You better be afraid of a ghost!!
"Woody you were baptized in prop wash"..crossfireoops
Woody
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Joined: Jul 2001
Posts: 60,226 Likes: 27
Campfire Kahuna
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Campfire Kahuna
Joined: Jul 2001
Posts: 60,226 Likes: 27 |
There's only about a 2-grain difference in powder space between the two--about 4%. This doesn't mean there's a 4% (100 fps) difference between the two rounds in velocity, given the same pressure, because of the 1-4 Rule (any difference in powder capacity between cartridges of the same caliber equals 1/4 as much difference in velocity, at the same pressure.)
I used to be a 6mm Remington nit-picker, but gave it up a few years ago since 1% difference in velocity is way too minor to worry about, especially when .243 brass is far more avalable in many different brands.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
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Joined: Oct 2005
Posts: 544
Campfire Regular
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Campfire Regular
Joined: Oct 2005
Posts: 544 |
Flip a coin. Heads you win.....tails you win. Regards, Rick.
John Deere tractors and Sako rifles.....doesn't get any better.
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Joined: Mar 2010
Posts: 10,896
Campfire Outfitter
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Campfire Outfitter
Joined: Mar 2010
Posts: 10,896 |
But the 7x57 parent case is just plain sexier than a 308..
You better be afraid of a ghost!!
"Woody you were baptized in prop wash"..crossfireoops
Woody
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Joined: Nov 2010
Posts: 37,224 Likes: 9
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2010
Posts: 37,224 Likes: 9 |
But the 7x57 parent case is just plain sexier than a 308.. I think so, but tell that to the AI crowd... DF
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Joined: Jun 2007
Posts: 912
Campfire Regular
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Campfire Regular
Joined: Jun 2007
Posts: 912 |
I am such a fan of Lapua brass on many levels - I would go 243
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Joined: Mar 2007
Posts: 96
Campfire Greenhorn
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Campfire Greenhorn
Joined: Mar 2007
Posts: 96 |
243.............thank us 243 guys later.
I will say this. I am a 243 fan like no other. I have recently played with a 6mm Rem during fireforming for a wildcat. Found myself wondering why not 6mm over 243. I came up with this. Grab a SA, Toss primers, powder, and bullets at it and it will produce very acceptable results. The 6mm, seems to take a bit more across the board. NOT much, but enough to push me back to .243.
Fast is Fine but Accuracy is Final.
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Joined: Jul 2010
Posts: 2,691
Campfire Regular
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Campfire Regular
Joined: Jul 2010
Posts: 2,691 |
I have had both. I still have the .243, for all the reasons discussed. Game can't tell the difference. Good luck, jack
"Do not blame Caesar, blame the people...who have...rejoiced in their loss of freedom....Blame the people who hail him when he speaks of the 'new, wonderful, good, society'...to mean ,..living fatly at the expense of the industrious." Cicero
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Joined: Oct 2002
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Campfire Oracle
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Campfire Oracle
Joined: Oct 2002
Posts: 96,121 Likes: 1 |
"Dear Lord, save me from Your followers"
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Joined: Mar 2005
Posts: 17,527
Campfire Ranger
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Campfire Ranger
Joined: Mar 2005
Posts: 17,527 |
My next 6mm/243 barrel will be a 7.5 twist.
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Joined: Feb 2003
Posts: 6,435
Campfire Tracker
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Campfire Tracker
Joined: Feb 2003
Posts: 6,435 |
"As you walk thru life, don't be surprised that there are fewer people that you encounter seeking truth than those seeking confirmation of what they already believe!"
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