Brian in Montana
Well-known member
Ive looked into the 6.8 Western. It would require that I change the bolt face and it would take up more space in the magazine, both are cons, still considering it.
My next project...
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Wind Gypsy
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The headaches of wildcatting should get you some kind of marginal improvement. Making a 260, 7/08, or 284 into a .277 bore is the opposite of improvement.
7mm bullets of the same weight frequently have very close to equal BC but you should be able to have slight gains in velocity, barrel life, and ease of finding accurate and consistent loads.
7mm bullets of the same weight frequently have very close to equal BC but you should be able to have slight gains in velocity, barrel life, and ease of finding accurate and consistent loads.
old roper 42
Active member
It's easier open 6.5X284 case then necking down 284 case for 270x284. I have some Nosler 6.5x284 new and I neck one up for 270x284. You would need bushing .306 neck down 284 case but that based on cases I have. If you want I can send you couple cases neck down. I did 30x284 about 20yrs ago and with powder back then I could equal 30-06 with 165gr/180gr.
I may neck 284 down since have bushing for that just to see what it looks like.
Brian in Montana
Well-known member
Well.. at this point I'm pretty well settled on going with a .284 Win. - just a neat cartridge all around. As far as twist rate goes, I'm intending to focus on 150gn bullets, or 140s, but I really don't have much interest in trying to go higher than 160gn (bear in mind this is going to be a lightweight, backpacking, medium-to-large-game hunting rifle). I'm leaning towards a 1 in 9 twist, but maybe a 1in 10 would be better? Probably not enough difference to tell for the application and projectiles I have in mind, but it's hard not to overthink these things.
cahunter805
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Brian
A 10 twist would work for your desired bullets. Nothing wrong with a 9 twist either in case you decide to go heavier or monos. I’d go with whichever was in stock in your barrel of choice. If both are available go 9 for sure.
std7mag
Well-known member
I've got a 1:9.5 twist on my 284 Win.
That will take you easily through 168gr bullets.
Bear in mind, SAAMI 284 Win reamers have a loooong freebore.
Mostly due to the firearms Winchester designed it around.
If you get some 284 Win cases & the bullet you want to use, you can make up a dummy round & get the freebore specs for it.
That will take you easily through 168gr bullets.
Bear in mind, SAAMI 284 Win reamers have a loooong freebore.
Mostly due to the firearms Winchester designed it around.
If you get some 284 Win cases & the bullet you want to use, you can make up a dummy round & get the freebore specs for it.
Brian in Montana
Well-known member
I could see giving Barnes or Hammers a try in this gun, which is another reason I was thinking about a 1 in 9 twist.
chevyman181
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What's your 280ai set up?
Brian in Montana
Well-known member
I'm not sure what you mean exactly. But it's a 26" ss Criterion RemAge barrel in a Remington 700 action set in a B&C stock. It's more accurate than I can shoot.
Brian in Montana
Well-known member
I had kinda forgot about this thread. I'll post some pics later. I haven't had the chance to do a whole lot of load development with it yet, but got it shooting 140gn SGKs very accurately shortly before hunting season began.
Brian in Montana
Well-known member
Here's the end result. Fun, lightweight little gun. The smooth barrel nut was a royal pain to deal with, but all told it came together nicely. Very pleased with how it turned out; now I just need to shoot something with it.
