Just picked up a Zastava M70 and interested in what folks are using.

Sorry to answer a question with a question, but what's a Zastava M70?

http://www.zastava-arms.rs/sites/default/files/m70-stand-sl.png

Basically a Remington 798 or Interarms Mk X

My Ruger No.1 really likes Varget and Speer 270's, though shoots well enough with other bullets. Reloader 15 is the go to powder for many and works well for me also.

This is the load my rifle likes:

Book load of H414 with a 270gr Speer bullet. Or book load of RL15 and a 300gr barnes TSX. Using FED 215 primers

75 gr IMR 4350, Fed mag primers, 300 gr Nosler,


Now I am experimenting with Varget and 260 Accubonds

1) 79.5 grs of H-4350,Rem 9-1/2 mag,300 gr Sierra GK.

2) 76.5 grs IMR-4350,Rem 9-1/2 mag,260 gr Nosler Partition.

What kind of accuracy and speed are you getting with #2. Thanks buddy...

Never measured the group,but will say an inch +/-. The velocity is kinda slow,it averages 2600 fps.

Have you tried H-4350 with the 300gr Partition?

Nope,the Sierra shoots to good for me to try the Partition.

69 grains of RL-15 and the terrific 260 grain Nosler Accubond.

.8" groups at 100 yards. 2620 fps. Modest recoil. Dead bears.



Regards, Guy

I have. Shoots good. Am only using 75 gr of H4350 with the 300's. Usually results in about 2550 fps and good accuracy. Haven't used the 300 gr Partition on game yet. I don't know why it wouldn't work...

Guy

BTW - without hesitation - I'll FREELY admit to borrowing my two "pet loads" from John Barsness.

69 grains of RL-15 and the 260 Nosler Accubond
75 grains of H4350 and pretty much whatever 300 gr bullet I choose

Both work GREAT!

Regards, Guy

My rifle likes 80gr of H4350 with a 300 grain Partition and CCI mag primers. 2550 from my 20.5 barrel. Shoots mountain goats, brown bears, moose, and lesser animals stem to stern.

My last Ruger #1 .375 liked 73 grains of RL15 and the 260 grain accubond. 3/4ths of an inch for 3 shots .. but only after I did ye olde fore-end hanger set screw trick to calm the vertical stringing.

Tom

80 gr of IMR-4350 or WW-760 under a 300 gr Partition, in WW brass lit with Fed 215 primers.

The first load I wanted to work up for a used 700 Custom Shop version I bought used off of Gunbroker was a reduced, .35 Whelen level load for deer. I decided to use the Speer 235 semi-point and IMR 4064. The last two times I shot it, 68 grs put four shots in 0.8" and 0.9"...Fed 215 primers and Nosler "blem" cases.

I haven't chronographed it yet but I think that'll work.

This load with WW-760 gives me 2550 fps and has been my Africa recipe for 2 trips for buff and other game.

Did you ever notice any temp sensitivity in Africa?

No chronograph in Africa, of course, but the ammo fed and functioned perfectly. As a rule, I work up my loads in the heat of our Texas summers, so if there are pressure issues, it should be revealed here. I'm guessing that the velocities were similar in Africa, because the temps are similar.

Waited until I got home to my records to respond. Of course every rifle is a different story. Mine is a Whitworth that Jim Kobe modified for me, including shortening the barrel to 22".

I worked on load development with the 270 grain Barnes and RL15 last summer. The max load according to Barnes is 77 grains. On one of my trips to the range, I loaded 3 at 72 grains and shot them over the chronograph just to get a sense of velocity. That yielded 2574 at 10' from the muzzle.

The next time out, I took 7 loaded with 75 grains. Three shots over the chronograph gave 2641 fps which would be a muzzle velocity of about 2650 fps. I shot the remaining rounds at 100 yards. The first 3 went into 0.57" and the 4th opened the group to 1.28".

On the next trip, I took 10 rounds loaded with the max of 77 grains. Three over the chronograph gave 2702 fps, and the other 7 shots at 100 yards (with barrel cooling) gave a group of 1.53". It may have been my imagination, but I felt like there was a slight stickiness to bolt lift with these max book loads.

I decided to be happy with the 75 grain load. Don't think anything I would shoot would notice the slight velocity difference. And if both loads are zeroed at 200 yards, there is only 0.1" difference in drop at 300.

BTW, these groups were shot with a Leupold 3X with HD reticle.

I'd have stayed with your 75 gr load as well.

Nothing's going to notice 50 fps difference. At least I don't think so!

Keeping my .375 sighted in at 200 yards, but have had no problem hitting the gong at 300 time after time, and no problem hitting bear at 300, or a bit farther either. Using a 2620 fps load with the 260 gr Accubond.

Practicing with some old 270 gr Hornady bullets at the same velocity works real well too.

The doggone .375 is a wonderful cartridge!

Guy

Agreed! I have been most sincerely impressed with it!

Loaded up the following and will be heading out to the range tomorrow.

260gr Nosler AB
W760
74.5-76.5-78.5
R-P brass
9 1/5 primers

260gr Nosler AB
RL15
69-71-73
R-P brass
9 1/5 primers

It's a good bullet, I'd lay odds on seeing at least a couple of "keeper" loads.

I have killed half a dozen deer with 200 gr. Sierra FN and 41 grs. Imr 4759.

These are the best loads Ive found

Against all logic rifle likes 66.5 grains of R-15 under any .375 diameter bullet I have ever stuffed in it from 235 grains up to 350 grains.

The only improvement to that caliber I would make is reduce MV by about 200fps. Lets face it it's not a long range hunting caliber where one needs to worry about bullet drop. Alternative way to do that is to sell the .375H&H and buy 9,3x62 or .35 Whelen with a fast twist barrel.

That makes absolutely zero sense to me.

Scratching my head over that one, too.

I have 9.3x62 and .375 H&H.

I would like to hear the reasoning that went into that statement.

It's gotta make sense to someone...

DF

Yep, I don't believe in hotrodding a given cartridge, but why not realize at least most of its ballistic potential?

?

Seems to me a lot of the tid bits of "wisdom" we read on line and for sure, here on the Fire, is more rooted in Urban Myth, hearsay and what intuitively would seem to be fact, than from actual hands on experience.

I always appreciate hearing from those who've actually "been there, done that", producing info one can "take to the bank".

There's definitely an art to sorting it all out, ending up with a meaningful summary of workable, proven facts.

IMO,

DF

DF,

It's certainly important to hone the skill of separting wheat from chaff on the internet! I get a lot of valuable information, but ....

My .375s are my go-to rifles for just about every hunting application. Outside of Africa the following load has proven to be sub-moa and as deadly as needed.

.375 Holland and Holland Magnum
235 GRAIN SPEER – 83 GRAINS - IMR 4350 – CCI Standard Primer

By "standard" primer, do you mean CCI 200???? That is a standard rifle primer. I'd think you'd want to use a magnum primer (CCI 250) to ignite that much powder.

That Slavek is a looney SOB sometimes. Having both myself, it doesn't make much sense to me either. The 9.3x62mm is not a 375 H&H...

I've seen the 300 gr partition used exactly once on an Alaskan brown bear,from a Federal factory load that chronographed about 2450 fps. I guess Federal keeps things conservative, figuring they don't want any pressure issues where 375's are used a lot. Like any cartridge, rifles and velocities will vary.

Anyway the sluggish velocities did not matter to the bear,which was down and out with two deliveries. Both bullets exited.Nice thing about the 375 bore is, the bullets are already big going in,and will set up larger frontal area than many smaller calibers.

Point being you don't have to firewall a 375 to make it work good.

My favorite load (here...never been to Africa) is a 250 BBC and 77 gr RL15 in WW brass and Fed 215 primer,for about 2900 fps; the 250 Sierra for practice(they group together). I have had this bullet smash both shoulders of an Alaskan BB and exit. Big hole. Figured I really did not need anything more over here and stuck to it.This load made me sell all my other medium bore rifles.

The 375 may not be what we think of as a long cartridge but that load matches a 150-270 or 165 30/06 for trajectory to 400 yards, about as far as I have run it. I would not want to get in its way at that distance.

Anybody running 250gr TTSX?

.375 Wby with 250-grain TTSX for me. Try at 75 grains RL-15 with .375 H&H -- about 3" high at 100 yards and 3" low at 300 yards.

71.7 gr Re15 under a Barnes 300 gr TSX, sparked by a Fed 215. Terry

73 gr. RL-15
Rem 9-1/2M primer
270 gr. Hornady spire point

No idea on velocity but that combo has walloped whitetail to zebra.

I load 74/RL15, Fed 215M, Nosler brass, bullet seated significantly off lands (just to fit in mag box of old Model 70). Nearly every 100 yards group has bullet holes touching, or nearly so. Always sub-MOA.

I haven't clocked it yet, but expect it's around 2750 fps(pretty mild); am sure I could get close to 2900, but have had no reason to do so.