Wow! So I still can see one problem with RL26...I've yet to see it on the shelf around here. I've been toying with getting some RL 26 or IMR7977 to play with the heavies in the 270. I see 7977 often.
I was able to cross 2900 with a 150 over 4000MR when playing with that powder. I also found RL17 will get them close to 2900. All of these are out of a 23.5" barrel.
That's impressive. It's been a long time since I even 'considered' another powder for my 270s. 7828 has served me well since it first became available to me.
I'll be looking for some 26 and hopefully test it come Spring.
Here's a thread showing the results I got from 7828ssc in my son's .270. Velocities were the highest I've ever seen from a .270 but the pressures were there too...
If my people, who are called by my name, will humble themselves and pray and seek my face and turn from their wicked ways, then I will hear from heaven, and I will forgive their sin and will heal their land. 2 Chronicles 7:14
Here's a thread showing the results I got from 7828ssc in my son's .270. Velocities were the highest I've ever seen from a .270 but the pressures were there too...
Now 10 days after the fact & with a bruise still visible on my shooting shoulder, I'm thinking Alliant's maximum load of 60.8 grains of Reloder 26 with the Nosler 150 Partition might be a bit much, for me personally anyway.
Well, in all truthfulness I substituted the LRAB 150, but that bullet has a shorter bearing surface so it follows the pressure should be less all other things being equal.
That load gave no signs of over-pressure in my rifle, and did shoot 1 MOA. I hate to give up that speed as it flattens out my trajectory...
So after talking out of both sides of my mouth, guess I'll retest over the chrono for an actual FPS / SD and of course accuracy again.
If it checks out safely, guess I'll have to look into a Limbsaver recoil pad or a Benchmark muzzle break!
I've not measured the bearing surface area if the 150 LRAB yet, but I'd bet it will be less that the Partition, thus a little less pressure with a given load.
I used Nosler's max load of magpro out of my 270 Win. with a 24" barrel shooting the 150g ABLR. The velocity averaged 2860 FPS and was very accurate. This was ~ 50 fps slower than Nosler indicated with their rifle.
My load with the highest velocity in 270 Winchester, in a Vanguard S2 is with RL26 I used 61gr. with 140gr. Accubonds Winchester cases and WLR primers. The average for 5 shots was 3124fps. Also group was under a inch. 59.6gr of Norma MRP Gave 3081fps. with same bullet. 58.2gr of MRP gave 3006fps with 150gr Nosler Ballistic Tips. I,ll Try the RL26 with the 150gr Nosler Partitions next. They shoot very accurately in my Vanguard.