A Guy Out West
Well-Known Member
With a MV of 2800 FPS, what twist rate would be required to stabilize it? Anyone know?
With you 8 would work 7.5 might be better if you can get itAnything longer than 10" will only be marginally stable. Nine inch is fine. Eight inch better.~Muir
Neither twist nor throating will be a problem with the Hornady 160gr RN [#2640].I'm certain he is talking a larger cartridge like the 264 Win Mag.~Muir
I've shot a couple thousand of these bullets in various 6,5s. I've always kept a few hundred around for my 6,5x55s.~MuirNeither twist nor throating will be a problem with the Hornady 160gr RN [#2640].
At 32mm it's the same length as the Hornady 140gr SP,and shorter than the Sierra 140gr BTSP. What's different about it is that the 22mm ahead of the cannelure is .257" so it doesn't contact the rifling & 'rides' the bore. The other 160gr RN bullets from RWS, Kynoch, and the Sierra SMP are .263"-.264" parallel section, so can't be loaded up like the Hornady.
This is fine in my 1:9" Tikka 6.5x55 at 2500 fps* so a slower twist will work at 2800. If GOW is talking about the .264 WM, the Winchester M70 and Rem M700 had a 1:8" twist anyway.
The Hornady 3rd Edition has loads for this calibre from it's heyday, pushing the the 160gr up to 2900 fPs from a 24" Win M70. The remarks say they burnt out several barrels compiling all the load data. Many copies of this on EBay btw, GOW . . .
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I reckon you're right. He'd be pretty pushed to get 2800fps out of a 6.5prc even, unless he has a 26" barrel.I'm certain he is talking a larger cartridge like the 264 Win Mag.~Muir
At 32mm it's the same length as the Hornady 140gr SP,and shorter than the Sierra 140gr BTSP.
I've seen a lot of Moose turned into steaks by 160s out of a 6.5x55 .I've shot a couple thousand of these bullets in various 6,5s. I've always kept a few hundred around for my 6,5x55s.~Muir
.264 WinI'd have thought pushing these bullets at 2800fps is a tall order, but you don't say what rifle & cartridge. But to stabilise them does require a twist of 1-8.
I never tried one in my 6.5x55SE Steyr.
1-8 is the MSch M1903 6.5x54 rifles I have, in these however the 160gn bullet doesn't reach the MV of 2800fps.
The MV is more like 2450fps. Not long ago I had my M1903 MSch Takedown re-barrelled in 6.5x54MSch & it shoots 160gn bullets well using both IMR4350 & 4831.
You do need a fairly long throat in your rifle though.
Mine is a new Model 70 Win. Pretty sure the twist is one in 9.Neither twist nor throating will be a problem with the Hornady 160gr RN [#2640].
At 32mm it's the same length as the Hornady 140gr SP,and shorter than the Sierra 140gr BTSP. What's different about it is that the 22mm ahead of the cannelure is .257" so it doesn't contact the rifling & 'rides' the bore. The other 160gr RN bullets from RWS, Kynoch, and the Sierra SMP are .263"-.264" parallel section, so can't be loaded up like the Hornady.
This is fine in my 1:9" Tikka 6.5x55 at 2500 fps* so a slower twist will work at 2800. If GOW is talking about the .264 WM, the Winchester M70 and Rem M700 had a 1:8" twist anyway.
The Hornady 3rd Edition has loads for this calibre from it's heyday, pushing the the 160gr up to 2900 fPs from a 24" Win M70. The remarks say they burnt out several barrels compiling all the load data. Many copies of this on EBay btw, GOW . . .
Hornady 3rd Edition for sale | eBay
Get the best deals for Hornady 3rd Edition at eBay.com. We have a great online selection at the lowest prices with Fast & Free shipping on many items!www.ebay.com