Agree. With bullets lighter than 140gr it's just too slow if max velocity is what you want, and with the real light bullets you might get ignition problems as the pressure would be too low. It would give decent MV with the 140's and might give the highest MV for the 160gr. As for accuracy, you'd have to experiment.
264 win loads
- Thread starter grit
- Start date
Agree. With bullets lighter than 140gr it's just too slow if max velocity is what you want, and with the real light bullets you might get ignition problems as the pressure would be too low. It would give decent MV with the 140's and might give the highest MV for the 160gr. As for accuracy, you'd have to experiment.
Pathfinder
CGN Ultra frequent flyer
- Location
- Northeast Ontario
I believe I worked up to 77 or 78 Grains of US869 behing a 140 . Only managed a little over 3000.........
The 264win is one of the few cartridges I have not played with yet. Looking at the manuals they list loads not much higher in velosity than the 270win with the same bullet weights, And a fair bit slower than then 270wsm. I would think the 264 should be able to outpace the 270win by 200fps and should be very close to the equal of the 270wsm. In most manuals they are listing RL19,RL22 and IMR4831 as the best powders,must need something slower as most of you have stated.
I have never been successful in getting max velocity with the 264 using 139/140 grain bullets with H4831, RL22 or Norma MRP. You need considerably slower burners to get max velocities out of it. I had reasonable success with RL25, Vihtavuori N170, H1000. Best though were H5010, H870 & Retumbo. Regards, Eagleye.
Data for the 264WM is pretty old.Most powder and bullet companies have burned out their pressure barrels long ago,so they just reprint the old data. There isn't enough interest to start again,that's why John Barness' article in Handloader is the best data out there.
IMR 7828 is pretty fast for the 140 ,but it is nice and lineral.A lot of factory loads have used it.
IMR 7828 is pretty fast for the 140 ,but it is nice and lineral.A lot of factory loads have used it.
RL22 gave good accuracy at 59gr for me with a 140gr @ 3000 FPS, but as soon as I went to 60gr I was getting pressure signs 
I agree you need slower powder to get the speed out of a 264. My rifle did not like Retumbo at all Have not tried IMR7828 yet. I am sure hoping US869 will be the ticket when I get some
I agree you need slower powder to get the speed out of a 264. My rifle did not like Retumbo at all Have not tried IMR7828 yet. I am sure hoping US869 will be the ticket when I get some 
Has anyone found that primers make a big difference in the 264? I now remember in my old 264 I used CCI 250's instead of 215F because I was getting much more consistency with a simple primer switch as I started development with the 215F. I have not tried CCI 250's in my new one & am thinking it may not hurt?
back40sniper
CGN Regular
- Location
- South east Sask.
Us 869 130 TSX, 73 grains 2900, 74 grains 3007/sd of 18. Will try some more and report back. With 7828 I am using 64grains for 3300/sd 11 with 120 TSX and shoots under an inch. We shot three mulies with the 120 load last year and its a killer. With 62 grains of RL-22 and 120 TSX got 3250 and under an inch.
Pathfinder
CGN Ultra frequent flyer
- Location
- Northeast Ontario
I was using 58 grains of rl-22 with the 130 TSX. Not the best speed but very accurate.
71.0 grains and work up from there. Max should be around 75-77 grains, depending on your rifle. Eagleye.
piece of cake...in the same case necked to .284...
There's a reason the 7mm Rem Mag buried the 264.....
eh Wookie?
piece of cake...in the same case necked to .284...
There's a reason the 7mm Rem Mag buried the 264.....
eh Wookie?
Yeah, Yeah, you just like how Dad's 7mm turned out
H870 smartened it up
I was able to get a pound of H870 for testing. Things are looking up.
Had to go to the gunsmith to have a trigger issue resolved which turned out to be a weak return spring. I also had him put a recessed crown on it & throat it 45 thousandths longer. Now the bullet seats much nicer. I am at a COL of 3.495 with a 140gr Accubond.
I loaded new Win brass with 215F primers. I started at 73gr H870 & went up to 75gr H870 with the 140gr Accubonds.
I only loaded the 130gr Accubonds at 75gr H870
I also tried some 130gr Accubonds with 62gr IMR7828. Speed was OK, groups sucked & signs of pressure were showing.
The 140gr @ 73gr were kind of all over the page.
The 140gr @ 74gr did the vertical string thing This made no sense what soever. The one is a definite pull, but the other 4 got higher every shot? Weird? Speed averaged 3179 FPS. This was also shot before the other groups. Any ideas on that group?
The 130gr @ 75gr grouped very well. There is 3 shots in that cluster at the top This group got me excited. Average speed was 3254. High 3265 Low 3248.
The last group was the 140gr @ 75gr. The one is a definite pull. the average speed was 3206. High 3216 Low 3197.
Looking like 75gr is the magic #. I'll play with the seating depth a bit. I am 12 thousandths off the lands currently.
Being H870 is discontinued I am hoping I can duplicate these groups with US869 when I get some this weekend.
The frustration is now starting to lift. I am now seeing the FPS & grouping I was looking for. A 264 with the right combo can shine.
I was able to get a pound of H870 for testing. Things are looking up.
Had to go to the gunsmith to have a trigger issue resolved which turned out to be a weak return spring. I also had him put a recessed crown on it & throat it 45 thousandths longer. Now the bullet seats much nicer. I am at a COL of 3.495 with a 140gr Accubond.
I loaded new Win brass with 215F primers. I started at 73gr H870 & went up to 75gr H870 with the 140gr Accubonds.
I only loaded the 130gr Accubonds at 75gr H870
I also tried some 130gr Accubonds with 62gr IMR7828. Speed was OK, groups sucked & signs of pressure were showing.
The 140gr @ 73gr were kind of all over the page.
The 140gr @ 74gr did the vertical string thing
This made no sense what soever. The one is a definite pull, but the other 4 got higher every shot? Weird? Speed averaged 3179 FPS. This was also shot before the other groups. Any ideas on that group?The 130gr @ 75gr grouped very well. There is 3 shots in that cluster at the top
This group got me excited. Average speed was 3254. High 3265 Low 3248.The last group was the 140gr @ 75gr. The one is a definite pull. the average speed was 3206. High 3216 Low 3197.
Looking like 75gr is the magic #. I'll play with the seating depth a bit. I am 12 thousandths off the lands currently.
Being H870 is discontinued I am hoping I can duplicate these groups with US869 when I get some this weekend.
The frustration is now starting to lift. I am now seeing the FPS & grouping I was looking for. A 264 with the right combo can shine.
Pathfinder
CGN Ultra frequent flyer
- Location
- Northeast Ontario
Being H870 is discontinued I am hoping I can duplicate these groups with US869 when I get some this weekend.
Good Luck. Fill us in on the results.
my tests with US869 were nothing like the ones I had with H-870 in the .264 but then again I was not using the exact same bullet and seating .
.....Being H870 is discontinued I am hoping I can duplicate these groups with US869 when I get some this weekend.
Nice work. H870 was loved, but is gone forever. It will be interesting to see how US869 sizes up. Please compare their relative densities as well, i.e. can you fit more US869 in the case?
I'd love to get ahold of some Vihtavuori 20N29 or N570 to try.
US869 is TOO slow for the 264 IMO.
Well I got back from the Gun Show with a fresh pound of US869 to try in the 264. First off, I have no photos to post as it didn't really knock my socks off & there is nothing new to see
Loaded 140gr Accubonds starting at 75gr up to 78gr & 5 rounds of 130gr Accubonds at 77gr.
Bottom line is speed was slow & accuracy was average. FPS spreads were decent though. Here is how it broke down
140gr Accubonds:
75gr only shot 1 @ 2984 FPS
76gr FPS averaged 3047 FPS Low 3040 High 3053. 3 shots with 2 touching (almost on top each other) grouped 3/4" & 2 other shots were touching, but about 2" from the group? Not sure if it was me or not?
77gr only got 2 shots to read. 1 @ 3099 & the other @ 3081. Shot a nice little 3/4" triangle, but had one shot about 1" higher & one about 2" to the right? Again not sure if it was me, it was windy today & busy at the range.
78gr is TOO much in my rifle. First one was a tight extraction & read 3140 FPS & the second was a VERY tight extraction & did not register on the Chrony. I brought the rest home to be pulled.
130gr Accubonds
FPS averaged 3106 FPS. Low 3072 High 3124 FPS. No accuracy at all. 5 shots in a 2" group.
I have read a few posts claiming US869 to be TOO slow for the 264. I will add my name to that list. If 3050 FPS was my goal, I can reach that with a lot less RL22 & the same accuracy.
I had high hopes for US869, but it just didn't make the mark. Oh Why Oh Why did they discontinue H870
It is looking like once my H870 is gone (which won't be long) I'll have to tweak my RL25 load as it is doing quite nice in that 3100 FPS range.
Just thought I'd post this info for those 264 shooters since there isn't much data with new powders & the 264
Well I got back from the Gun Show with a fresh pound of US869 to try in the 264. First off, I have no photos to post as it didn't really knock my socks off & there is nothing new to see
Loaded 140gr Accubonds starting at 75gr up to 78gr & 5 rounds of 130gr Accubonds at 77gr.
Bottom line is speed was slow & accuracy was average. FPS spreads were decent though. Here is how it broke down
140gr Accubonds:
75gr only shot 1 @ 2984 FPS
76gr FPS averaged 3047 FPS Low 3040 High 3053. 3 shots with 2 touching (almost on top each other) grouped 3/4" & 2 other shots were touching, but about 2" from the group? Not sure if it was me or not?
77gr only got 2 shots to read. 1 @ 3099 & the other @ 3081. Shot a nice little 3/4" triangle, but had one shot about 1" higher & one about 2" to the right? Again not sure if it was me, it was windy today & busy at the range.
78gr is TOO much in my rifle. First one was a tight extraction & read 3140 FPS & the second was a VERY tight extraction & did not register on the Chrony. I brought the rest home to be pulled.
130gr Accubonds
FPS averaged 3106 FPS. Low 3072 High 3124 FPS. No accuracy at all. 5 shots in a 2" group.
I have read a few posts claiming US869 to be TOO slow for the 264. I will add my name to that list. If 3050 FPS was my goal, I can reach that with a lot less RL22 & the same accuracy.
I had high hopes for US869, but it just didn't make the mark. Oh Why Oh Why did they discontinue H870
It is looking like once my H870 is gone (which won't be long) I'll have to tweak my RL25 load as it is doing quite nice in that 3100 FPS range.
Just thought I'd post this info for those 264 shooters since there isn't much data with new powders & the 264
