Howdy all,

I'm new here, so let me say hello...Hello

Any, I have a Ruger No. 1 in .375 H&H, and some 270gr TSX and some IMR 4350 in stock. I don't, however, have any load data for this combo.

I wrote to Ty at Barnes, and he gave me some info, but it all involved RL-15 and IMR4895.

I've loaded some 270gr Hornady SP with 65.5gr of H4895, and got 1MOA with 2650fps.

It made me happy, but I was looking for something a little less dense, and a little slower. I saw a load at:

http://www.imrpowder.com/data/rifle/375hhmag.php

with the IMR 4350 - 78.5 grains as a compressed load with a 270gr SP.

That go my interest, because I'd like to have a MV of about 2600 fps, and if the max is a compressed load, then I should get some real good case capacity when loaded down to about 2600 fps.

Also, I'm curious about others experience with the COAL. The throat leade on my Ruger is long. Really long. I'm at work, so I don't have my notes with me, but if I were to load to 0.05" off the lands, My COAL would be like 3.800"

Jeeze, I'm a little long winded and quite confusing for my first time out, so let me break it down:

1) Does anyone have any Min/Max for the .375 cal 270gr Barnes TSX with IMR 4350 and

2) Does anyone who loads for a Ruger No. 1 in .375 H&H have any advice on the overall length?

It's good to be a part of this place, thanks for having me.

EMC2

I have been shooting the 270gr TSX alot in the past year through my bolt rifle. I started out using W760 velocity was around 2450fps. I then tried some H4350, and found that since this bullet is so big you will compress powder before you will reach 2500fps. I have just recently started using RL-15 and it has been great. The velocity of around 2650 with 73.0gr. Groups are under an inch. You should try some RL-15, you can always down load to your desired velocity. This powder IMO will probably work the best since this is such as big bullet size wise. Hopefully this can help some. Reguarding your OAL, measure your seating depth with the bullet touching the lands, then back off .050". You can always go deeper if your groups aren't what you want.

My Loadtech program says a 270 X bullet w/
IMR 4350 starts at 69.5 gr. Work up from there they list 77.7 as max at 62000 PSI

EMC2,

I'll second what safari says about Reloader 15, it's really THE powder for the 270 TSX. We've tried it along with a bunch of others and had by far the best accuracy with RL-15. 74.0gr gives right at about 2,700 fps and sub MOA groups in our rifles (3 M70s and a Rem XCR).

Thank you gents,

Looks like RL-15 needs to be on the purchase list.

Rob1SG thanks a bunch for running the load for me. I guess I should try to get a program like that. Did you ever try quickload?

On the overall length...
The bullets seated out to 3.800" look almost gangly and unsafe. Provided I have seated the bullet at a depth equal to the diameter (.375) should I be worried? I'd rather not use a crimp if I can avoid it...

Thank you again
EMC2

Did you measure your overall length with the bullet touching the lands? Then seat .050" deeper. If so then your fine. Due to the construction of the TSX they need to be at least .050" of the lands.

Thank you for the info.

With the ogive of the Barnes TSX, I have a maximum OAL of 3.793" I brought it back to 3.74 and have had some encouraging results.

Unfortunately RL-15 was not in stock in the two places I have near me, so I went with the IMR4350.

I'm under an inch with 71.2 through 72.5, but it began to open up at 75.5. I plan on going back for more, as I witnessed absolutely no pressure sign on any of the discharges.

Thanks again,

EMC2

How is your velocity with that load, I found that I couldn't get enough 4350 under the TSX to give the velocity I could easily reach with RL-15.

Hi Safari,

With 71.5 Avg = 2435, STD = 6.4
With 72.5 Avg = 2467, STD = 6.2
With 73.5 Avg = 2489, STD = 13.2
With 74.5 Avg = 2536, STD = 18 (light compression)
With 75.5 Avg = 2543, STD = 7.9 (Bit more comp)

I'll go back and do 76.5 and 77.5, watching carefully along the way and quit there.

I just get so caught up in making it work, I forget how expensive the bullets are and I'll have to redo it all anyway when the RL-15 comes around. But at least I'll have a couple of different loads if I'm in a pinch. Too much fun I can't get enough!

Best,

EMC2

I don't know how long your barrel is but my 375 has a 23" barrel and I could only get up to about 2500fps with 77.0gr of H4350. I used 73.0gr of RL-15, and easily got 2640fps with .5" groups. I worked up to 74.0gr with no problems and velocity was 2700fps but my goups opened up. Your barrel is probably longer than mine, so I would uess you could easily reach 2700fps and probably more. I could not justify using H4350 with 2500fps with a 270gr bullet since this is about the speed I push 300gr bullets. RL-15 works magic with 270gr bullets.

I would do the same, no doubt. My No. 1 has a 24" bbl, so that might give me an extra 30-50fps...I think.

Anyway I really can't wait to get my hands on some RL-15.

Did you do anything with the 235gr?
That's my next trick. I'd really appreciate a powder suggestion, since I'm going to order somw anyway..

Thanks
EMC2

No I have never loaded anything lighter than a 270gr bullet in my 375HH. Sorry I cannot help you on this one.

Re 15 will do quite a bit better than 4350. Again, tho nobody says boo about it, IMR 4320 does really well in my M70 and is listed in the Barnes manual. No problems with case capacity. with 270 barnes x, starting load 70 grains, max 75 for 2800. It has been very accurate with 300 grain Noslers, Barnes Originals, and Hornadys. 65-67 grains, max vel about 2550. Don't know how this translates to TSX,but Barnes should be able to tell you. Good luck.

I would just imagine that the 4320 and RL-15 are pretty comparable in burn rates.

The first thing you need to do is buy THREE current, different loading books. Then read each one at least twice cover to cover and you'll get a lot more info and loads.

Can't provide the loadings, but, I've loaded 230, 250's 270 adn 300gr in .375H&H. Seems like I used 4831, the 250's I know I used 4895 for those 20 test loads.

Don't have my records since moving and moving back in. Things are mixed up and missing. I'll have to start over and NBD as I seldom shoot this gun.

Get those books, they are the most important part of reloading.

Wish you well,

George

According to Hodgdon- 4320 and RE 15 are indeed close. I just happened on some 4320 cheap . RE15 seems like the go to powder for 375, however Swift says H380 is good with 250's - haven't tried it yet.