powder suggestions for hunting loads

[hornsurgeon]

having a hard time getting a straight answer to this. i am looking to load a larger capacity case about the size of a 35 whelen or 30-06. (284 parent case) would be using a gas checked cast boolit of 250-275 grain .375 diameter and would like to get 2000-2400fps. no load data is available for this cartridge. i have heard that a medium powder would be best, but others have said to used something like unique. i usd varget in this case with 250gr "J" bullets for about 2400-2500fps. could i use varget for this? what powder would you suggest? starting loads?

mark

[nemo]

try your powder The worst that could happen is not a full burn . or look in a loading book for 35 wel. What is case cap? fastest powder for next heaviest boolet

[357Mag]

Horn -

42 - 43gr I 4064 outta do it.

Start out low, and work your way up.

As a very coarse comparo:

- a .35 Rem discharges 200 grainers with some 35.1gr of I 3031.

- a .35 Whelen/Improved tosses 270s with perhaps as much as 56 gr I 4064
from what I little load data I could scrape up.


Best of luck.

Regards,
.357Mag

[runfiverun]

back that varget down about 20%
and see what ya got

[felix]

I would use your Varget load exactly if you are using the same weight jacketed bullet, and then back down to improve accuracy if needed. Know the accuracy desired before you shoot, and don't change your mind. Limit the boolit to 2400 fps for sure. ONLY gas checked boolits for this endeavor. Assume you have 18 twist. If you have a faster twist, lower the Varget 5 percent per unit gain in twist for accuracy purposes. Trying to maximize your performance here. We are not talking about a tricked out target gun, I don't think. The 4064 load would be just about right on if your gun was a 35 caliber, so increasing the powder speed to Varget would be appropriate for the 375 caliber. ... felix

[Larry Gibson]

You have a pretty good expansion ratio there and varget may not work well. Many times it doesn't burn consistantly until a certain pressure level. That pressure level may be too much for the velocity you want. If Varget doesn't work I would try 4895 with a starting load of 55% of case capacity (to bottom of bullet) with a 1 gr dacron filler until 80% case capacity is reached. I woud also try some of the slower powders (RL 19, H4831SC, RL22, etc.) starting at 90% case capacity and working up to 100% case capacity.

Larry Gibson

[Bass Ackward]

You don't say what your barrel length is. You don't say how hard your bullets are.

If you want to shoot soft, then you gotta be kind to that slug.

Your list of options declines, with a shorter barrel or a softer bullet if you want higher velocity.

[Thumbcocker]

AA3100 has given me good accuracy at 2000 fps in .30-06. Also 8700 in 06 and .30-40.

[hornsurgeon]

thanks for the input. the barrel is 18". i have not checked the twist. the bore is in excelent condition as it was recently rebored from 284. alloy will be ww+2% tin. if needed i will harden as needed. i think i will try the varget first, as it is a moa gun with j bullets. if that doesn't work , i have 4831sc and re22 to try. varget has been extreamly good to me in my 223, 22-250, 7mm-08, 7x57, 8x57, 35 whelen, and 9.3x57, all with j bullets. this is my first endevor into cast loads for hunting. just trying to take it to the next level of fun.

[Leftoverdj]

Lee #2 has a mess of data for the .35 Whelen with 250 and 280 grain cast bullets. I'd expect that data to be about dead on for your wildcat with the slightly smaller case capacity and the slightly larger bore cancelling each other out.

You are not going to get 2000 fps with accuracy using air cooled WW in that cartridge. The pressures needed are too great. You might do it with linotype, but I think you are going to have to oven treat WW.

[Maineboy]

I have a 35 Whelen that will shoot a 280 grain boolit between 1600 and 2200 fps very accurately with surplus 4895. It's the only powder I use with that boolit now. I suspect you'd do as well with the same powder or the IMR or Hogdon versions in your 375 bore.

[runfiverun]

i think iwould start out with water quench, with your mix,
and 4895 and go from there, you will want a g/c design here.