257 Weatherby with IMR 8133

[MikeT49]

I recently assembled a 257 Weatherby for hunting. 26" barrel, 9 twist, standard chamber dimensions. I have a selection of suitable powders and load data for most of them. However, I have searched the web for IMR 8133 data and not much out there. I have called Hodgdon (left message) and emailed, no reply yet. I only have 1# of IMR 8133. Does it shoot good enough to warrant continued searching to purchase more? Starting load? I have 115 Nosler partitions, 110 Accubombs and 115 Bergers in the heavier 25 cal bullets. Thanks, Mike

 

[Downeast]

I have had good success with R25. If you happen to find some info on 8133 please let us know.

 

[Gary in MD]

For the bullet weights that you list, RL22 & IMR 7828 work pretty well giving top velocities and accuracy depending on the individual rifle.
I have been considering trying some 7977 in my 257 hoping that it would work as well and provide temperature insensitivity.
Gary

 

[MikeT49]

I received a reply from Hodgdon. They do not have 8133 data of their own at this time, but "are scheduled to do some in the future".
I have plenty of 7977 and data so will be trying that. Same goes for RL 26 and IMR 7828ssc.
My range is open to members who took the after hours training and have cards to operate the auto gate. I usually had it to myself when I went there after hours. We'll have to see see how it is now. I have a spray bottle of Lysol for decon. Mike

 

[Ackman]

What works beautifully in mine is RL22 with either the flat base or BT Sierra 100, they both shoot about identically (best load in the .2's) going very fast. A 12 twist Hart barrel and 0 freebore chamber. AckleymanII turned me on to this years ago and oh lordy does it work on rockchucks. But with a 29" heavy barrel plus 4" long brake, and at 16-1/2lb, it's not something to be carrying around. AckleymanII was getting 3850 with his 26" barrel (same chamber) and pretty much the same load.

 

[TAJ45]

He sold that one to me abt 14 yrs ago.
Boy, is it Fast AND Accurate. Not sure how long before needing set back. RL22 like to say.

 

[Gb300wm]

Imr 8133 was not available when I had my bee. My luck was with Imr 7828. I tried other powders(H1000, Rl22-25), but always came back to Imr 7828 for velocity and accuracy. Now H1000 was not to shabby with the berger 115, but by far Imr 7828 was the winner for me with the bullets listed and I tried most. My bee was very accurate and fast....

 

[Ackman]

He sold that one to me abt 14 yrs ago.
Boy, is it Fast AND Accurate. Not sure how long before needing set back. RL22 like to say.

I remember that. The years pass too quickly don't they.

He told me about how fast that thing was going and that I had to have one. So I had one built. With a a 29" 12 twist barrel and his tight chamber, accuracy load with those 100's are at 4000. Intended for rockchucks and it does a severe number on them.

 

[TAJ45]

Dave, do you remember whose bbl you have? He was running the blue tipped BTips wa PacNor iirc - you?

 

[Ackman]

Hart barrel. Sierra 100's, both BTHPmatch and BTspitzer. On a Savage action.