375 HH

[remingtonman_25_06]

First time loading for one. Looking for some proven starting points with 300g bullets. Rifle is an M70. Thanks guys!

 

[Guy Miner]

From my load notes:

300 gr Sierra SPBT, 66.6 IMR 4064, 2553 fps avg, ES=12, SD=4

300 gr Sierra SPBT, 75 H4350, 2560 fps avg, ES=33, SD=13

Both were accurate. I also note that the 75 H4350 developed 2521 fps with the 300 gr Hornady BTSP. That particular powder charge is recommended by John Barsness as being useful with pretty much any 300 gr bullet.

I always use Fed 215 magnum primers with the .375 H&H.

Have taken to simply neck-sizing as well - and have found no need for a crimp - though I considered using one.

Regards, Guy

 

[Silent Sam]

375 H&H is easy to load for and many powders will work well. Pretty much anything medium burning rate will work. Last I loaded were 250gr Sierras and I used 760. It will work for 300gr loads also. I have used both Fed 215s and WLR primers and both worked fine. I partial size to keep the die off the shoulder as I don't have a neck sizing die. I do crimp with the Lee FCD, just my preference.

 

[remingtonman_25_06]

Thanks for the insight guys. First couple go rounds with 300g interlocks and varget/4064 are doing about 1.5-2"...getting 2 touching or within 1/2" and a huge flyer. Might try a different bullet here soon.

 

[IdahoCTD]

R-15 gets good velocity in a H&H. The last one I loaded for was with 260AB's at 2900+fps with R-15. The powders that work in a .308 will pretty much work for a 375 H&H.

 

[preacher]

I used 76gr W760/300 Sierra SBT, Fed 215, WW cases back when. I also used around 80gr with 760/235X, this was back in the late '90s. Around then I discovered that the Winchester factory load using the old 270 Failsafe shot extremely well in three different 375s in our group. We just started hunting with them , but still used handloads in our 300's, 338's and 340W. Its hard to find a 375 H&H that 'won't shoot", and even 1.5 to 2" from a big gun is kinda norm. A lot has to do with your benchrest technique and your own nervous system. You most likely already know this, just saying.

 

[Guy Miner]

What do you guys think about crimping the .375, at least when using bullets with a crimp groove?

I was tempted simply because of the mystique of it being a "dangerous game" rifle - and the bullets having a crimp groove - and there being a fair bit of recoil.

Haven't found it necessary, but yeah, I sure have thought about it, to keep the bullets from jumping forward in the cases during recoil.

Thanks, Guy

 

[preacher]

Crimp away! One reason I really like the LEE Factory Crimp Die is I can crimp "any" bullet, cannelure or not. I think "bullet pull" contributes as much to accuracy as deburred flash holes and uniformed primer pockets, maybe more. I crimp almost everything now! ha

 

[Guy Miner]

Hmm. Other than the .30-30, I don't crimp any rifle cartridges... Interesting.

Do put a good roll-crimp on my revolver cartridges though.

Guy

 

[300 H&H]

Crimp away! One reason I really like the LEE Factory Crimp Die is I can crimp "any" bullet, cannelure or not. I think "bullet pull" contributes as much to accuracy as deburred flash holes and uniformed primer pockets, maybe more. I crimp almost everything now! ha

Same here. I use the Lee factory crimp die for the 375 Ruger. I seat bullets magazine length and it is below the cannelure. I like it because it is a tamper crimp and you can crimp without bulging the neck. Shooting a Nosler 300grain AccuBond at 2590fps out of a 20" barrel Guide Gun.

 

[JD338]

I have not loaded for the 375 H&H but I don't think I would bother with a crimp.
The only cartridges I crimp are 44 Mag, 45-70 and the 416 Wby Mag. Even the 338 RUM does not get crimped.

JD338

 

[Silent Sam]

Controversial topic for some. The only way to know is making identical loads with and without and then decide for yourself. I use the FCD because it works for me.

 

[jmad_81]

I know that the 375R is a bit different but I have had very good luck with H100V, IMR4895, and Ramshot Big Game. All these loads have been with a 260 AB though. You might look at trying a 300 AB. I have been very impressed with the 260AB in mine.

 

[Guy Miner]

I need to see if my neck is up to dealing with the .375 H&H again... Surgery was last spring. Should be healed up enough. Haven't shot anything rougher than 165's from a .30-06 since surgery.

Also need to see if I can find some game that is truly .375 worthy... :mrgreen:

Guy

 

[JD338]

I need to see if my neck is up to dealing with the .375 H&H again... Surgery was last spring. Should be healed up enough. Haven't shot anything rougher than 165's from a .30-06 since surgery.

Also need to see if I can find some game that is truly .375 worthy... :mrgreen:

Guy

Rock Chucks beware. :mrgreen:

JD338

 

[Guy Miner]

LOL! :mrgreen:

True though...



Rockchuck after a 300 grain SPBT Sierra...

 

[IdahoCTD]

A buddy and I built dedicated 358STA and 375H&H rock chuck rifles years ago with 1.25" straight barrels. We kept thinking the bigger the better but the bigger bullets didn't blow up like the smaller calibers. The 180gr .358 pistol bullets worked pretty decent but they were still tougher than 150gr Ballistic Tips which was our go to bullet until they changed the design and made them tougher.

 

[preacher]

Your neck is gristled up enough not to hurt anything, though it may still feel a bit "sore". Just go "Old School" and use the Woodleigh 235 and load it around 2600fps. You could still kill anything in North America with it!