I have rifle/cartridge combos that represent most calibers for hunting big game including a 21" barreled T/C Contender carbine in 375JDJ = 260gr Accubonds @ 2300fps and a 21" barreled Rem 700 LSS in 375RUM = 260gr Accubonds @ 3020fps.

I am looking at rebarreling a Rem 700 LSS in 30-06 to a 21" barrel chambered .375" cal cartridge that will split the velocity difference between these two = 260gr Accubond @ 2650fps.

I reload for everything now including wildcats but have never really fire formed brass before and would prefer to stay away from having to fire form brass but can do it if needed.

I'm hoping that from the vast knowledge on this forum that I can get the advise/recommendations I need to decide on what cartridge would fill this gap best for me.

If you don't want to form brass get the Steyr. Capacity is basically the same. I would have the throat cut so I could seat the bullets out since you have an 06 length action.

375-06?

Rich

would a 375-06 give me 2600fps - 2650fps with the 260gr Accubond?

quote:

would a 375-06 give me 2600fps - 2650fps with the 260gr Accubond?

From a 24" barrel more like 2550fps

A Steyr might push close to 2700 with the bullet seated long.

Check Z-hat he has no barrel length on the 375 but his other data is more 26" 2550-2600 from the hawk.

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

Another option is the 380 Howell
http://www.hunting-rifles.com/Ammo/ammunition.htm

It will do 2650+ with the 260. Brass and dies b oth available and they will chamber for you as well.

I shoot a 380PDK which is just slightly larger than the Howell. I've posted some data for it.
http://forums.accuratereloadin...691016921#7691016921

Moki,
2650 fps from a 21" tube using 260gr Nosler Accubond = 375 Taylor minimum.

A 375 JDJ (basically a necked up 8mm Mauser) will give 2420 fps from a 26" barrel at MAX pressure. This is an T/C Encore and the primers are cratered! I could get 2460 fps with a different powder, same pressure signs, but accuracy SUCKED.

I doubt a 375-06 would do much better than 2500 fps from a 26" barrel.

A 376 Steyr may do 2550 fps from a 26" barrel.

A 375 Taylor will do 2690 fps from a 25" barrel.

The Accubonds are LONG, and all these cases are capacity limited.

You can plan on losing 20 to 25 fps per inch of barrel. So the Taylor should be able to get you to 2600 fps +/- with a 21" tube. The others won't.

Of course I could be wrong, but I know what a 375 JDJ and a 375 Taylor can do. I own and operate them, plus I load for a couple Contenders to belong to friends (375 JDJ that is).

The 375-06, basically a 375 Whelen, would be very hard pressed to hit your target velocity in any barrel length. Think 35 Whelen with a heavier bullet.

quote:

A 376 Steyr may do 2550 fps from a 26" barrel.

Scott please note I said bullet seated LONG. If take a Steyr and load it to 3.34" like a Taylor you get a 9.5% net capacity increase over the base. That compares to a 375Taylor at 3.34" capacity of 73grs. These volumes come from QL so they are not measured by me.

My PDK case on a net basis is basically the same as the Steyr loaded long. The data in my link are actual numbers.

All that said the EASIEST way to get 2650 is a Taylor or larger case.

ScottS I can see what you mean I was just hoping to stay away from a belted case and 2550fps would be the minimum velocity that I would want with a 21" barrel otherwise I am not interested...

I have to say I really like the look of the PDK case do you have a bit more info on the brass used ei 280 Rem brass or 30-06...

Ramrod,

The Taylor in Rem cases has a gross capacity of 87gr H2O. I believe the Steyr is around 80 gr. The JDJ is 67 gr Rem 444 Marlin cases and a 375-06 (not fireformed) made with W-W brass is 77 gr.

Just some general info. Quickload isn't too often screwed up so I always measure my own cases.

Moki, the 375 Ruger should be able to do it easily I would think. I would hate to see the fireball though.

I have absolutely no interest in a 375 Ruger for this rifle/project just to big of a case and from what I have read velocities would be way higher than I want/need from this gun.

I would use the case capacity if I had it defeating the entire reason for this project...

Maybe a 375 Scovill is what I should be looking at...

You could load the 375 Ruger to 375-06 levels

quote:

The Taylor in Rem cases has a gross capacity of 87gr H2O. I believe the Steyr is around 80 gr. The JDJ is 67 gr Rem 444 Marlin cases and a 375-06 (not fireformed) made with W-W brass is 77 gr.

Scott I was simply talking NET capacity numbers with the bullet seated to 3.34" in both. I agree with your gross numbers but net is what holds the powder.

quote:

I have to say I really like the look of the PDK case do you have a bit more info on the brass used ei 280 Rem brass or 30-06...

Moki, On the first 380 & 416PDKs I built I used Norma 280Rem brass. When I built my second and third 380 as well as my 400 I went with Howell basic brass. Left them at 2.65" which allowed me to use the cannelure and full 06 Length mag box. Net capacity is basically the same since the Norma brass is a touch thinner.

The only difference between my 380PDK and the 380Howell is about 2grs gross less net. They start their shoulder at the same point as I do but use a slightly less taper and 35deg vs 40deg. My buddy actually simply loads 380Howell brass and they are a crush fit in his 380PDK. Then fireforms.

At the current time I only have my original reamer and don't loan it out. If you like the look consider the 380Howell real hard. However if you are hung on the 21" and 2650 you should consider the Taylor.

My Montana Action with a 23" barrel gives me an average of 2695 with Hornady 270 grain factory ammo at 20' from the muzzle. I loaded 270 grain Swift A-Frames using Varget to 2595 and I was one or two grains below book max. My Swifts were loaded to 3.110"OAL I think. Good luck.

What cartridge were you loading?

My rifle is in 376 Steyr and it is the short action Model 1999 in stainless steel. I think my loads were 62.5grains of Varget using Win primers and 270 grain A-Frames. The listed max is 65.5 grains. Ther are no signs of excess pressure in my loads and I am sure I could go higher. I plan to try some loads using TAC which is a very dense powder and is one that Barnes recommended to me. The Hornady 270 grain factory loads are max in my gun and the 235 grain factory loads which were loaded to give the same POI as the 270 grain loads show 2645 so they are light loads. My chamber was cut by Montana arms to fit dummy rounds I sent them using 270 grain A-Frames. The 30-06 action is longer that my action so the bullets could be seated longer for more powder.

We build the 380 Howell and it will do 2,650 in a 23" barrel easily with the 260 gr. Accubond. We have head-stamped brass along with Howell basic also.
We open up the 30-06 chamber on your current barrel.

If you want to use a M700, stick with an 06 diameter case. I've put the 376 Steyr in a 760 and it requires the bolt face be opened to accept the .500"case head. First you remove the extractor, then open the bolt face, then bevel the edges of the extractor ring and re-rivet. On a M700, I think the Sako extractor conversion would be the most satisfactory to accomodate the 376 Steyr...extra work and expense.

if you bother, do a 375 ruger ..
or 9,3x62 will scratch your itch

If you don't want a belted case go with a WSM/ or Ruger case...there are several wildcats on those cases that would fit your bill if you're locked into it...and the 375-06 AI would for sure.

There are a ton of alternative cases that will work including the 9.3x62...mine does 2640 with a 270 gr bullet without breaking a sweat...and if you don't like the 9.3 cal just neck it up 0.009" to 375.

And you always have the alternative of downloading a larger case.

Spend the $75 bucks for Load with a Disk and get a cartridge design program that you can "rollyouown" whatever size you want.

What's simpler than forming cases????...a little corn meal...a little bullseye and BOOM a formed case.

There are simple ways and very complicated ways to get where you want to go...maybe re-evaluating the parameters would make it easier.

Luck

My experiences with the 376 Steyr in a SBS Prohunter and the 375 Hawk/Scovill in an Interarms Mark X (22" as I recall) was that they both performed roughly within 50 fps of each other.

Undoubtedly the Steyr may have been able to pull ahead slightly with the increased OAL if it were in an action that would allow for it.

Based on the supply concerns with 376 Steyr brass at times and the expense of the Hawk/Scovill custom die set (really wasn't much of a hassle to form the brass, I just necked the 35 Whelen brass up with a .400 expander ball, then ran it through the FL die set enough of a shoulder was present that it wasn't an issue - I'd probably go with a 375 Ruger and load down if I were to do it again on a "standard" length action.

Edit - my memory is starting to get the better of me.

Here's a couple of other threads, my recollections of the velocity differences are a bit off.

http://forums.accuratereloadin...=848103906#848103906

http://forums.accuratereloadin...=848103906#848103906

I'm seeing what you guys are saying and I am definitely listening to the comments here...

I was originally looking at rebarreling an almost new Rem 700 LSS in 30-06 but I'm now starting to think that I should stop screwing around and just buy a single shot rifle in 375 Ruger or H&H and just down load it to the velocities I am wanting..

I know where there is a NIB Ruger #1 s/s black gray laminate stock in 375 Ruger and dies/brass will be easy to find...