Home Forums Reloading Big Game Rifles 375-06 Improved ?

Anyone have recommendations for the 375-06 Improved using 300 grain Nosler Partitions or Swift A-frame bullets ?

.

ya, send me a bullet for it

You are probably on your own on this one, but it will work just fine IMHO. Forget all the baloney about not enough shoulder and just go do it. I'll bet that you will be very surprised at how well it will work.

Get Vol I of PO Ackley's manual and read it through at least twice before you start loading. On page 483 he calls it the .375 Whelen and .375 Whelen Improved. Loads are for 235 gr and 350 gr. that will give you a place to start. RE 15 was not available in their day, but I would call Alliant and ask them for a starting place.

Maybe Ken Howell will post here. I think that he had a gun like that that he used with lead bullets.

Didn't Ken Howell develop a wildcat 375-06?

I would start by reducing RE-15 35 whelen loads and working up
I am thinking 50 gr.(but what do I know) You will end up somewhere around 55 grains of powder as bullet length/mag length will be the drawback. I know the 375 bullets I have are much longer than their .35 counterparts.
I load a 35 whelen in my single shot and I am compressing powder at 60 gr.(a little too hot) with a 250 grain bullet and I am too long for a 30-06 magazine but just off the lands in my encore.
I think it wll be an interesting project keep us posted.
I also load for a .375 JDJ encore handgun .375 based on .444 marlin case. And I load a .375 H&H those are some LOOONG bullets.
the 260 grain noslers and .235 speers are kinda stubby. I just measured a .375 300 grain partition and its 1.334 when you subtract .375 for seating that adds .959 to your case. my fired untrimmed .35 whelen case measures 2.490 that makes your catridge length 3.449.
standard OAC for an 30-06 is 3.340 You can set the cartridge a little deeper to deal with any magazine length issues but then you start cutting into case capacity.
You may want to consider the shorter bullets. The 235 speer measures 1.040" and the 260 nosler measures 1.144" I did not have a Swift bullet to measure.
If it were me I would not consider another powder than RE-15 until you know it would not work for your set up.

Good luck, If you have not built the rifle you may want to look into the JDJ round in the longer barrels they are getting some impressive velocities. I hope you find what you are looking for.

I think your pushing the powder capacity of the 06 case with the 300 gr. bullets and the velocity is less than optimum for sure...

The best solution to this has argueably been to use the 9.3x62 case to get that extra little bit of need velocity and it seems to satisfy those friends of mine who use this caliber, particularly in the Win. M-95 Lever guns..

Personally I see no reason for such a caliber because you can modify any std. length Mauser or win to take the great tried and true 375 H&H and if that extra 1/4 inch of bolt throw is a major distraction to you then you probably can't chew gum and walk at the same time, but if that is the case then you could use the .375 Ruger cartride and not have chew gum and walk at the same time.....:)

Why would the best solution be a re-chamber? The man asked about the 375-06 Improved and data for specific bullets. When a man asks for data for his .222 do you tell him that his best bet would be to re-chamber to .223 and why even the .223 when the .220 Swift is available.

Hammer1 here is a link to some data, hope this helps http://www.reloadbench.com/cartridges/w375whel.html

Check Handloader # 166 it has an article on the 375 Hawk/Scovill. It is a wildcat .375 -06 with the shoulder pushed forward a bit. Likely a little more case capacity than your .375-06 but try reducing loads by at least 10 - 15% for a start. It should give you an idea of the powders which will work best. Good luck.

Just added this link:

http://www.z-hat.com/375%20Hawk.htm

Hope this helps.

I've damn near pulled the trigger twice on building a 375 Whelen.

Third times a charm. Those nutrias will be running for cover.

The Cajuns would be impressed, don't ya think?

Never been desperate enough to want anything with the name "Scovill" attached to it.

Anna Scovill perhaps........

And then some.
I knew a guy that had a ,400 Whelen. It was very cool.

Don't know her, but there's the exception that proves the rule.

See....

Anna Kournikova, the eastern block/Russian tennis player.

She doesn't have anything to do with that editor guy, does she?

Laffin again, NOPE!

All I got is 270 gr. Hornady 57 grs. IMR 4064 for 2,340 fps for the 375 Imp......Twer me I'd run RL-15 and work up. Works in the 35 W and 400 W without pushing the pressures.


A 400 Whelen a pard has runs 66 grs. RL-15 with a 300 TSX at almost 2,500 fps in a 22" Pac-Nor (2,490) with superb accuracy. I just ran 50 through it Saturday. It will be hunting in three weeks...