Just wondering what you fellas have been using lately in this case that has put a smile on your face and tiny groups on your targets.

Try both H4350 and H4831.

quote:

Originally posted by Saeed:
Try both H4350 and H4831.

I agree, plus both of these are "extreme powders" which are not temp. sensitive.

H4831 +2

IMR 4350. jorge

I shoot primarily 350 gr Barnes Xs in the .416 Rigby. I load them warm (2700 fps) with IMR4350 or AA4350 ... and the pressure is low.

When you can make 5600 lb-ft with low pressure ... is enough of a very good thing.

IMR 4350 also! 95 grains with 400 grain soft point bullets. Fired cases are cold! 1" groups at 100 yards all day long.
Peter.

H4831SC - Very, very accurate. 100 grains with 400 grain Barnes.

But, I can't find any and am goingto try Reloader 22 - hopefully this weekend.

quote:

Originally posted by Saeed:
Try both H4350 and H4831.

Sounds like we are all singing variations on Saeed's tune.

Lately doesn't have much to do with me, these oldie-goldie loads go way back, and I can't improve on them.

All of the 4350s are similar and may overlap results due to lot-to-lot variations of IMR, AA, and H.

H4350 is indeed less temperature sensitive than the other 4350s.

As a starting point in a magnum action with 24" barrel, it is hard to improve upon this:

1. 100 grains of H4350 (+/- 5 grains)
with 300 to 350-grain bullets
>> ~ 2600 to 2800 fps

and

2. 100 grains of H4831SC (+/- 5 grains)
with 370 to 410-grain bullets
>> ~ 2300 to 2500 fps

Of course you have to chronograph and adjust the load to your rifle and the particular bullet.
Might exceed the old 47,137 psi CIP max,
but plenty of room to play with the modern rifle, brass, and bullets.
And you have room in the Rigby case to use the bulkier "long cut" H4831, same charges as with "short cut" H4831SC.

For example, the world's most accurate .416 Rigby
uses 105.0 grains of H4831 with the 380-grain GSC FN for just over 2500 fps.

105 grains of H4831 was the recipe that John Buhmiller shared with Jack O'Connor, for 400 or 410 grainers.

My "standard" load for our various 416s - Weatherby, Rigby and Rigby Improved - is 105 grains of H4831.

105 grains of H4831 is our standard load for the various large capacity 416 calibers - Weatherby, Rigby and Rigby Improved. all with 400 grain Trophy Bonded Bear Claw.

If you like VihtaVuouri powders then N165 works well.

RL 19, RL 22, and currently working load with RL 25 and IMR 4350. Have been shooting extraordinary groups with RL 19 and Woodleigh 340 gr.

100gns H-4350 400gn TSX fed 215 norma brass COL 3.650 in Ruger RSM 1.250 3-shots @100. 2" off sticks W/ irons @50...Good Luck.

Fopund a pound of H4831SC today, so will start with that. Thanks for all the suggestions, fellas.

Bill/Oregon,
Good choice.

Saeed,
I heard about that load from you on 7/30/00, through the forum.
I am sure it helped with my load development for a 1-shot cape buffalo killing in Botswana in July of 2001.

Here is your target and load data, it used to be located here:

http://www.accuratereloading.com/416tar.html

Still is!



As you said, it works well in all the big .416s, Rigby, Rigby-Improved, and Weatherby.

The 400 grain TBBCs and old Barnes Monolithic solids, and many other 400-grainers I tried,
also gave 2450 to 2500 fps in my .416 Rigby.
Yep, averaged around 2475 fps for the lot.

By comparison, the Federal factory load with the 400-grain TBBC only averaged 2308 fps.

One can usually do better than factory ammo by handloading!

I am quite conviced that a reason for accuracy in 416 Rigby is shooters using pow pressure loads.

In addition, because they are not trying to get top velocity that allows a lot latitude in loads and where only accuracy is the consideration.

I have found this applies to other calibres where you load them to a level that amounts to the maximum ballistics of a smaller case.

I feel sorru for 458 Lott shooters straing for the last 10 f/s while a 460 will do the same like a big V8 idling down the road in top gear

Saeeds loads for his 375/404s fit the same principle.

For some reason bedding and/or barrels that are less than good seem to shoot with reduced loads.

I am please to report 1/2" 3 shot groups at 100 yards from the bench using Barnes 400 Gr solids and 100 Grs of RL 22.