JeffG
Member
Llama Bob, you started with an amazing cartridge, waiting for future posts.
Not really - other than being fast twist, the .26 Nosler case is so big that it's hard to find a powder slow enough to fill it up with the heaviest bullets. It falls off the end of the burn rate chart. With lighter bullets it's a barnstormer. But for this bullet, it would move me from Retumbo to H-50BMG, and I'd gain a whopping 35 ft/s.As a 6.5x55 Freak, I always thought the .264 Win was cool. Good to see you doing this Llama Bob! So sick of everything being Creedmoor.
BTW, with the .264 Win mag, does anybody really need .260 Nosler?
You really want a 156 or 160gr to ensure proper penetration. There are only two available in the US: the Hornady round nose, and a Woodleigh Weldcore protected point.
That does look like an option, although the .348 BC doesn't make it a very exciting one.Norma Oryx 156 grain.
Tried it - didn't shoot very well.
SMKs and other frangible bullets are definitely not suitable for elk. Also probably not legal if Parks & Wildlife wants to make an issue of it. I can't find a length for that bullet anywhere, but stability in a 1:9 seems unlikely anyways.Also
https://www.midwayusa.com/product/1...264-diameter-150-grain-hollow-point-boat-tail
(I know, twist rate. Also, much debate about whether or not SMKs are suitable for hunting. I would feel comfortable with them. YMMV)
That does look like an option, although the .348 BC doesn't make it a very exciting one.
SMKs and other frangible bullets are definitely not suitable for elk.
Tried it - didn't shoot very well.
SMKs and other frangible bullets are definitely not suitable for elk. Also probably not legal if Parks & Wildlife wants to make an issue of it. I can't find a length for that bullet anywhere, but stability in a 1:9 seems unlikely anyways.
Here's the data from the 1/2% velocity ladder:
View attachment 797705
Two of the shots didn't register on the chrono.
View attachment 797706
I also figured I'd shoot at paper just for the heck of it while doing this. There's not too much to be gleaned from shooting with a magnetospeed on since it certainly changes POI and may change barrel harmonics, but it's fin. Also, I didn't wait enough time between shots to keep the barrel very cool, which on a featherweight like this isn't conducive to accuracy. That said, if you match the group # in the table up to the target, you can see how everything shot (50y target).
View attachment 797707
All points of aim were the center of the respective diamonds/circles. I fell like certainly by group 4 I was shooting well and there's not much user error in these which is good. This rifle shoots very comfortably for a magnum featherweight rifle. It's never bruised my shoulder.
Based on this data, I'm comfortable using 64.5 or 64.8 as my charge weight. For a first try I'll split the difference and try 64.6. They're in the middle of a flat spot, have reasonably low spread (especially 64.5) and grouped OKish. I also like that the group moves down as velocity increases, because that's self-compensating at range. The other way is bad. Of course it may not still do that when I take the magnetospeed off. Group 6 (65.4) is an example of something with a small spread and tight 2-shot group, but which the velocity ladder shows is going to be nothing but trouble as it's in the middle of a sharp increase in velocity and spreads.
My first load to shoot for accuracy is going to be 64.6gr, and I'm going to increase the jump to the lands to .030 based on the fact that that was the best jump for the .284 version of this bullet. Next step is to make 10 round of that and see how it shoots.
That sounds about right - one grain of powder has somewhat more impact than one grain h20 of case capacity., so I'd expect the ratio to be a little higher than 8.7:1.Old NRA rule of thumb from the .30-06 era was that 11 grains of difference in brass weight corresponded to one grain of powder when going from commercial to GI brass.
I've got one - a 28" octagonal barrel 1885. Should be fun to mess with.Winchester is now selling rifles in 6.5 Creedmoor. They have a 1:8 twist. The 264 WinMag has a 1:9. If the .264 had a 1:8 twist I’d start saving for one.
The first is that I ordered a set of Whidden dies and sent in fired cases. I got the micrometer seater and their click adjustable neck sizer. Should be very nice. Now I'm committed to this caliber - if this barrel won't shoot, I'll have to get another one to justify these swank dies
Do you have a Hornady tool? Used to be Stoney Point. I use one to check length to ogive on everything I load. Quick, easy, appears accurateI also have been working on improving my measurement capabilities for ogive length and shoulder position.
I have both their ogive and shoulder tools as well as their system for measuring the chamber. They seem to work reasonably well with the new calipers but I'm a little disturbed the results are as far off of the previous attempt as they are. I don't really understand why.Do you have a Hornady tool? Used to be Stoney Point. I use one to check length to ogive on everything I load. Quick, easy, appears accurate
I've found I've got at least 2 accessories that the resulting cases do not fit in at the shoulder. One is a World's Finest Trimmer.