375 H&H 250gr TTSX

I am going to start loading these bullets in a 22" barreled s/s T/C Prohunter in 375H&H = I'm also interested if anyone has actual load data.
 
While I don't use the 250 tsx I do use the 270 tsx in my Sako 375 H&H. I found that RL15 was the best powder. All I did was as normal with any load. I found the max for the gr of powder that I wanted to try of all 270 gr bullets and started 10% under that. I then worked up my load from there. I don't have my data infront of me but I was 1 or 2 gr under max of a normal 270 when I seen some very mild pressure signs. I backed off another gr and it shot under a inch so I never played with it again.

In Ken Waters' "pet loads" he said the best powder, when he revisited it later on, was RL15.

But thats just what I did.
 
I use 84gr H4350 for these bullets in my NEW KING- the 375 Ruger. I expect that you could load close to this with the ol' H&H. Probably max out at about 80-82gr
 
I just went to the Nosler reloading site and printed off the data for their 260gr Accubond's.

I'm only wanting 2600fps with the 250gr TTSX bullets = I'm not looking for top pressure/velocity loads anyway.

I'll be starting with either IMR4064 or IMR4350 powders mostly because I have it on the shelf already. :D
 
Camp Cook said:
I just went to the Nosler reloading site and printed off the data for their 260gr Accubond's.

I'm only wanting 2600fps with the 250gr TTSX bullets = I'm not looking for top pressure/velocity loads anyway.

I'll be starting with either IMR4064 or IMR4350 powders mostly because I have it on the shelf already. :D
Click to expand...

At one time my Son In Law lent me his custom 375 H&H to 'play' with. I don't have the target showing the results I got using the Sierra 250gr SBT and IMR 4064. As I recall, accuracy was great using 67 grs.

While the bullet wasn't the Barnes 250gr TTSX, using the 250gr Hornady SP and the RN, loads using IMR 4350 performed equally as well.

375HH.jpg
 
I started loading the 250gr TTSX last night decided to go with Alliant RL17 before I tried IMR4350 I can't find actual data but Alliant states to use IMR4350 data so having a couple of lbs on the shelf convinced me to try.

Being that I have a velocity target of only 2600fps - 2650fps I figure I can reduce pressures and perhaps recoil, if I want recoil I'll grab my 375RUM... :)

I started loading last night 5 rounds each with 75.5grs - 76.5grs RL17 now I just need time to get to the range.

I'm also loading with IMR4350 some far less expensive 250gr Sierra Prohunters to get the rifle/scope zeroed on paper.
 
I raced to the range for a 45min range session late this afternoon.

Here are the results from my 22" barreled s/s T/C Prohunter synthetic stock in 375H&H this rifle weighs 7.5lbs complete with scope base/rings/scope/sling = yes this little cannon has a bit of recoil... :D

I was sighting in the VX3 2.5-8X36mm B&C reticle scope so do not have accuracy results + I was looking for my goal velocity I'll work with these and other loads know that I now what kind of velocities to expect from this barrel.

Sierra Gamekings 77grs IMR4350
1) 2552
2) 2515
3) 2519

250gr TTSX 75.5grs RL17
1) 2593
2) 2607
3) 2609

250gr TTSX 76.5grs RL17
1) 2618
2) 2643
3) 2648
 
I sent an email to Ty Herring of Barnes this morning he has already responded.

He tells me that Barnes recommends using the load data for their 250gr X bullets with the 250gr TTSX.

Here is a link to the Barnes data that he sent C:\Users\owner\AppData\Local\Temp\375 H&H Magnum.pdf

I have now settled on 76gr RL17 3 shot groups @ 100 yards are averaging from 3/4" - 1 1/4" depends on me = I am completely content with the velocities and the accuracy I am getting.

Now to get off this computer and head up the valley going to try again to break in this combo on a nice coastal blacktail buck... :)
 
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