260 rem powder choices

[LongRange]

I shot RL-22 exclusively in my 300wm and never seen the huge temp swings everyone claims...it worked very well in my 260 but I had to pack it in...I'd shoot 17 over 22 if I had the choice of both


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[Dave Hoback]

Hmm, well reading the website, Alliant specifies 23 as having "TZ" Technology for the reduction in temp swings, and specifies it as ideal for long range shooting. These two items aren't listed for 22. But wouldn't surprise me if it's just a bunch of hoopla! Well, I'll worry about it in the summer. I won't be through my 17 until then. I may end up just sticking with it. It's the powder I read specifically for 260rem. Before the 260, I was pretty set on BLc2 for my 223s, 4350 for the 30 06 loads.

[LongRange]

i dont know about the "TZ" Technology sounds like a catchy sales pitch to me just like IMRs Enduron line of powders claiming to reduce copper fouling and be less temp sensitive.

[Randominator]

IMR4350 is my "go to" powder for the 260 Remington. Looking through my data, I have tried 4064, H414, BL-C(2), and RL15 as well. 4064 and H414 gave similar velocity and accuracy as 4350. Accuracy was good with RL15 and BL-C(2), but velocity was slower.

[rbp75503]

Here are some other powder possibilities. Granted I only tested match/target type bullets as this rifle will only be used for target shooting.



Savage Mdl 110C 260 Rem 28" 1-8" Shilen





Sierra .264 140gr MatchKing HPBT










Powder
C.O.L.
Start
Max
Most Accurate
Group






Retest
BL-C(2)
2.765"
34.0
36.6
35.0
.595"






GoodToGo
Viht N550
2.765"
33.2
38.0
37.5
*.179"
* 4 Rounds Measured




GoodToGo
IMR4064
2.765"
32.0
37.1
37.0
.361"






NoGo
H4350
2.765"
41.5
44.5
44.0
.700"






GoodToGo
IMR4831
2.765"
41.0
44.0
42.5
.379"






NoGo
IMR3031
2.765"
30.0
32.5
31.5
.510"

[darkker]

i dont know about the "TZ" Technology sounds like a catchy sales pitch to me just like IMRs Enduron line of powders claiming to reduce copper fouling and be less temp sensitive. I'm unfamiliar with the TZ business, but the Enduron line came from roughly a year ago when General Dynamics totally rebuilt their plant in Quebec(formerly IMR). The "Copper Cleaners" are French tech from about 1900, you can read about it in Hatchers Notebook. Originally it was only Tin Compounds, General Dynamics has added a series of Bismuth compounds as well, and tweeked the amounts. The tin compounds for cleaners has been in 760/414/748 for essentially ever; Olin just didn't promote it well. Temp sensitivity works, just have to know what a thing is designed around. One of the things that many don't know, is that when a powder tries to compensate for heat soak in the primer, the powders burning rate actually speeds-up, or slows somewhat. To see this on a chrono it needs to be good, and have someone shoot through it frequently. Can get a bit interesting if you are loading extruded by weight instead of volume, makes the movements difficult to track without some pressure equipment. For the average Joe, do a simple heat soak test. So shoot enough quick rounds to get the barrel good and toasty, through the chrono. Then follow up five rounds, with various amounts of time sitting in that hot chamber; you can see it on the chrono then. Kind of interesting.

[simo hayha]

reloader 17, is the best

[Randominator]

I used IMR4064, H414, BL-C(2), RL15 and IMR4350 when I developed loads for my 260 Remington before settling on IMR4350. It appears very stable to me as shots during December posted identical velocity as shots fired in July.