IMR 4831 for 6.5x284

aaronmcoleman

Active Member
Joined
Dec 23, 2020
Messages
26
Location
wyoming
Hey guys and ladies, I’ve been around lurking for a while but just getting active on this site.

due to shortages I have a 6.5x284 with 140grain Barnes match burners and a bunch of IMR 4831 (NOT H4831 or 4831sc). No real data for a starting load online for this combo.

my Nosler book shows 46-50g for their bullets with IMR4831
Lyman shows 43.5-46g using a 140g Sierra SBT with IMR4831
Barnes shows 46.6 to 51.8 using H4831sc.
Hodgdon shows 43-48g IMR4831 for a 140g.

So I’m kinda newish to reloading and brand new to 6.5x284 NORMA. any thoughts or resources for where to start? I’m thinking 43 grains and working up seems safe?

thanks!
 

YZ-80

Well-Known Member
Joined
Feb 20, 2019
Messages
1,213
Location
Maryland
Well, you definitely have yourself a great cartridge so congratulations on that! I think 43.0 might be a good place to start but don't have first hand knowledge with IMR 4831 in this cartridge. I've always used H4831sc and H4831 with very good results (Sorry you can't find any). You could look for some H1000 maybe? If not, the IMR 4831 is still worth a try.

I have the 6th edition Nosler Manual as well but it came out in 2007 and when I was working up a H4831 load for my 6.5-284 (130 Nosler), I ran into pressure signs at about 1.5 grains below the published max in that edition, which was 53.5 grains. I recently noticed that Nosler revised that published max down a full 2.0 grains to 51.5 grains. Be careful with that old Nosler manual!
 

jasonco

Well-Known Member
LRH Team Member
Joined
Feb 11, 2009
Messages
1,398
Location
Colorado
Welcome. confirm that you have a Norma (long) throat or Winchester (short) throat? The difference could be catastrophic! I know first hand, mine is stamped Norma, but its Win all the way!

IMR will be good to go, watch your bullet seating depth and work up low.
 

aaronmcoleman

Active Member
Joined
Dec 23, 2020
Messages
26
Location
wyoming
Welcome. confirm that you have a Norma (long) throat or Winchester (short) throat? The difference could be catastrophic! I know first hand, mine is stamped Norma, but its Win all the way!

IMR will be good to go, watch your bullet seating depth and work up low.
It’s definitely a long throat. Truth is I don’t have it in hand yet, but will measure when I do.
 

aaronmcoleman

Active Member
Joined
Dec 23, 2020
Messages
26
Location
wyoming
Well, you definitely have yourself a great cartridge so congratulations on that! I think 43.0 might be a good place to start but don't have first hand knowledge with IMR 4831 in this cartridge. I've always used H4831sc and H4831 with very good results (Sorry you can't find any). You could look for some H1000 maybe? If not, the IMR 4831 is still worth a try.

I have the 6th edition Nosler Manual as well but it came out in 2007 and when I was working up a H4831 load for my 6.5-284 (130 Nosler), I ran into pressure signs at about 1.5 grains below the published max in that edition, which was 53.5 grains. I recently noticed that Nosler revised that published max down a full 2.0 grains to 51.5 grains. Be careful with that old Nosler manual!
I’ve got the newest edition. It lists IMR4831 with at 46-50g.

I listed a few other references I could find. Problem is 1) I’m not a super experienced reloaded so I ask questions before blowing my fingers off, and 2) the only bullets I could get (Barnes match burners) don’t list IMR4831 specifically and I’m not experienced enough to extrapolate info on my own.

from wha I listed above most manufacturers have 43-50 grains. So it seems like 43 would be a good place to start and build with caution. Some day thjs will all be second nature to me like it is to you guys. Thanks!
 

jasonco

Well-Known Member
LRH Team Member
Joined
Feb 11, 2009
Messages
1,398
Location
Colorado
Don't concern yourself with the particular bullet, just the weight, as your starting point.
 

jaywright

New Member
Joined
Feb 20, 2021
Messages
1
Location
oregon
I’ve got the newest edition. It lists IMR4831 with at 46-50g.

I listed a few other references I could find. Problem is 1) I’m not a super experienced reloaded so I ask questions before blowing my fingers off, and 2) the only bullets I could get (Barnes match burners) don’t list IMR4831 specifically and I’m not experienced enough to extrapolate info on my own.

from wha I listed above most manufacturers have 43-50 grains. So it seems like 43 would be a good place to start and build with caution. Some day thjs will all be second nature to me like it is to you guys. Thanks!
ive had alot of luck with imr 4831 shooting 300 win mag and 264 win mag great muzzle velocity.s nodes. I am currently 4 grains above recomended max because , I called nosler and they said they tested with partition bullets not barnes match burner bullets. They said due to bullet density it was ok to go above there max because the max for barnes burner bullets would be higher, due to bullet density being different. Its a great unsung powder, because most people have cattle mantailty and don't try these powders. It is temp sensitve. the charge wont be the same in winter as it will be in summer, so watch out for that. H1000 ,h4350 and other powders are said to be not as temp sensitive. I DONT KNOW HOW MUCH I BELIVE THAT. sorry didnt mean to caps that last sentence
 

Sockeye66

Well-Known Member
LRH Team Member
Joined
Mar 24, 2020
Messages
300
Location
Washington
I have the Hornady app on my phone and it does list IMR 4831 for 140gr class Hornady bullets. The low end is 45.2gr and the high end is 51.2gr. I use RL23 for the 6.5x284, but I think you'll be OK with what you have to get started.
 

Primary

LRH Assistant
Here are some related products that LRH members are talking about. Clicking on a product will take you to LRH’s partner, Primary, where you can find links to LRH discussions about these products.

 
 

Recent Posts

Top