.243 win & IMR-4831

[gamestalker]

I picked up some 55 gr. Nosler's today for one of the .243's and the only powder I currently have a decent supply of is IMR-4831, which has performed great with 90 grainer's. But my initial search in Hodgon didn't have anything for that light of weight projectile and IMR-4831, haven't yet searched stack of books, so there could very well be a load in one of the books. I'm hoping it won't be to slow burning for that light projectile, thus the reason for lacking data in the "H" pages.

So without having to get out of bed right now, I thought I would see if anyone not in bed at the moment might have a source with data for that powder and weight bullet. If so, no need to post the charge, just steer me in the right direction, as to which source/book, and I'll dig up the book and data in the morning.

I'm just too tired / lazy tonight to start the search.

Much appreciated!

GS

 

[ironworkerwill]

This is the lightest bullet I've seen data for:85 GR. BAR TSX IMR 4831- .243" 2.620" 38.3start @3014fps 49,900 PSI 42.6Cmax 3233fpa @58,500 PSI. It's likely too slow for most other 85gr bullets.

 

[mkl]

And I thought I was the only one who had a .243 that loved 4831!

My .243 shoots anything from 75 to 100 grain bullets at one-inch or less at 100 yards if I adjust the powder charge so that the base of the bullet sits on top of the load of IMR4831. No compression of the powder charge, but also no space between the bullet base and the top of the charge. If you shake a loaded cartridge and can hear the powder move, you need a little more IMR4831.

I have never tried any bullet less than 75 grains so I can't guarantee that your 55 grain bullets will be accurate, but I would personally give it a try using the guideline above.

As I recall, for a 75 grain bullet the charge of IMR4831 works out to be 47.5 grains.

 

[243winxb]

Steve's Pages has data, i have not tried IMR 4831 with a 55gr bullet. Ok with 90gr Bergers.

 

[TonyT]

Many, many years ago a friend and I purchased a 100 lb. keg of Hodgdon-4831 for 50 cents a pound. We used it for loading everything from 220 Swift/22-250 to 375 H&H. It is at it's best in high pressure cartridges.

 

[Shortstop]

Here's the load data from Nosler for the .243 but it doesn't show that powder for their 55gr bullets:

http://www.nosler.com/243-winchester

 

[Shortstop]

Just found my old Speer book (No.11 1988). They list for their 75 gr. flat base HP lightest bullet it shows:

IMR4831 - 45.0 gr Vel: 3175

47.0 gr. Vel: 3316

49.0 gr. Vel: 3439

Ruger Model 77 22" barrel 1-10 twist WW cases CCI-200, 250 primers

 

[gamestalker]

Well, after some research I decided to wait until I can locate some IMR-4350, as that seems to have a good track record with 55 gr. projectiles. So for now, I'm going with a 100 gr. Speer BT with that IMR-4831, that combination has worked very well for all the .243's I have loaded for.

Thanks for the responses!

GS

 

[cpt-t]

gamestocker: I shoot a Sako 243 and I use a 55 gr Nosler BT and 45grs of Varget. The load is warm but not MAX and will give about 3850fps don`t have a cronagraft. This shoots under an inch at a 100yds and this works on Coyotes, Ground Hogs, and Jackrabbits for me. And for PD`s it truley is that RED MIST that people like to talk about. GOOD LUCK TO YOU:
ken

 

[BoltLover]

I have found that the most universal powder for. 223 -.. 270win is H4895... that's what I buy. Seems to me that 4350 would burn too slow for that bullet. I could be wrong.

 

[BoltLover]

Here's some data from Hodgdon 2014 manual

 

[BoltLover]

Well crap it won't let me post the pic here.