375 Ruger velocity data.

[HeavyLoad]

I posted this in another forum with only one response. It was a good response but looking for some more info.
I bought a Ruger 77 African over the winter, it's the one that doesn't have the threaded bbl. for a brake or weight. I've only put about 30rds. through it do to weather & work. I haven't even put a scope on it yet. I'm thinking of taking the one off of my Rem.700 308, a Nikon monarch 2.5x10x42. And getting a new one for the Rem700. But that's a different subject.
Anyway I'm reloading for the 375 using H4350 & RL-17. Loads for the H4350 were pretty easy to find in Hodgdon's & Hornady's manuals. And the Hornady manual all so has loads for RL-17. But I've done about every search I could online and found lots of other loads, some on here & other forums & pdf articles. Which those were a little hotter then the Hornady manual lists.
My question is are these loads I'm listing safe & are the velocity's I'm listing about in the ball park area? I'm estimating the velocity with all the data I've accumulated from other people's posts using a chronograph. Some with 20", 23",24", 26" bbls.
Mine is a 23" bbl.

Using H4350
300gr. 79.5grs. 2610fps
285gr. 81.5grs. 2680fps
270gr. 82.5grs. 2730fps
260gr. 82.5grs. 2785fps
250gr. 82.5grs. 2790fps

Using RL-17
300gr. 81.5grs. 2730fps
285gr. 82.5grs. 2765fps
270gr. 83.5grs. 2800fps
260gr. 84grs. 2875fps

Now remember these are just a ballpark for the velocity's, but do they seem to be reasonable? Also any other data using these 2 powders would be greatly appreciated.
And I'm also thinking of trying the Barnes TSX 235 bullet. So any input on those would be good too. I also have Varget & H414 to use.

 

[LBZ]

H4350 loads seem to be " ball park " I get just a tic more out of a 24" Have not worked with R17 so can not help there.

 

[HeavyLoad]

I was figuring about 30fps per bbl. inch & about 30fps per grain of power. That formula seems to be pretty close.

 

[alf]

My results in a 23" Brux. Shot with moly plated bullets, so no charge weights are given.

250 Sierra's - H-4350 - 2947

260 Accubonds - H-4350 - 2924
R-15 - 2882 H-414 - 2896 H-380 - 2822 - best powder w/ this bullet

270 Hornady - H-4350 - 2813 - most accurate load in this gun.
H-414 - 2837

300 Sierra - H-4350 - 2728

R-17 wasn't around when I built this gun. I felt H-4350 was the best powder for all bullet weights in my gun.

 

[HeavyLoad]

Alf could you PM me your load data for your 4350 loads. That's some good velocity your getting.

 

[alf]

Again, all load work was with moly, so my charge weights are higher than yours will be using bare bullets.

I'm 2 1/2 grains more than your 270 or 300/4350 load. More than that with the rest, as you're showing the same charge for 250/260/270 bullets.

That's all I care to share....too many other variables to consider....

 

[HeavyLoad]

Ok thanks alf. Yea the loads I listed aren't loaded to the max.
But from your loads if I subtract using my formula I'm looking good as to my estimated velocity's

 

[AKShooter]

Mine loves Reloader 15. I played with both powders you listed but accuracy was best with 15. I'm running a 21 inch barrel. Upper end of nolser reloading book for 15 and get 2580fps with 300 grain accubonds

 

[HeavyLoad]

I've read that a lot of people are using RL-15 with the same results. I used it in my 308 but have since switched to Varget. Mainly because their was a lot of Varget available to me at the time & accuracy was the same. I'm planing on getting some Barnes TSX 235grs. That I'll try with some Varget.