7mm Rem Mag Powder

[huntid73]

Hello all, this year I took the plunge and dove into reloading. I am currently shooting 168 gr. Nosler ABLR bullets out of a Tikka T3x (so is my hunting partner). I worked this load up per the Nosler book, and was lucky to score some IMR 4831 powder, unopened at a pawn shop of all places. However, I saw that IMR 4831 has been discontinued in the US. That leaves me with looking for a more reliably sourced powder. I have heard the H4831 has a different burn rate. I am leaning toward H1000 (again, playing safe and going by Nosler book), but could use some suggestions! Also, I noticed the Hogdon data center doesn't have the 168 gr bullet for 7mm Rem Mag (but a 166 gr. bullet), I would prefer to play in the sandbox of known data - better to stick with Nosler data or try to find data from powder manuf.

Thanks!

 

[Jnasa]

Hello all, this year I took the plunge and dove into reloading. I am currently shooting 168 gr. Nosler ABLR bullets out of a Tikka T3x (so is my hunting partner). I worked this load up per the Nosler book, and was lucky to score some IMR 4831 powder, unopened at a pawn shop of all places. However, I saw that IMR 4831 has been discontinued in the US. That leaves me with looking for a more reliably sourced powder. I have heard the H4831 has a different burn rate. I am leaning toward H1000 (again, playing safe and going by Nosler book), but could use some suggestions! Also, I noticed the Hogdon data center doesn't have the 168 gr bullet for 7mm Rem Mag (but a 166 gr. bullet), I would prefer to play in the sandbox of known data - better to stick with Nosler data or try to find data from powder manuf.

Thanks!

For my 300 win mag I loaded good loads using both H4831 sc and H1000. I think you could get either to work.

I have the 8th edition of the Nosler manual and it has data for the 168 grain bullet. I would think their online data would also.

 

[huntid73]

For my 300 win mag I loaded good loads using both H4831 sc and H1000. I think you could get either to work.

I have the 8th edition of the Nosler manual and it has data for the 168 grain bullet. I would think their online data would also.

Yes, my Nosler book has load data for my ABLR...but Hogdon's reload data doesn't. So I can use the powders in the book that were tested for that cartridge (some of the powders they tested aren't readily available anymore), or take the 166 grain data from Hogdon and work from there? I don't want to cowboy a load without a good reason to!

 

[Sheltowee]

Different burn rate but not dramatically. H1000 makes a lot of sense to me-- best combination of case fill and performance based on Nosler's data.

 

[WVmike]

I have a Seekins PH2 7mm Rem Mag and have been using Hornady ELD-x 150 gr with IMR 4350 and I have been using a lyman manual. I also have a nosler book that I will compare with and it seems the nosler book loads are a little bit heavier in regards to powder weight for round. There was one other powder that I constantly see on the shelf besides the IMR 4350 at my local gun store but I've had 1/2-3/4" groups with the IMR 4350. I don't remember the charge weight but I think it was just a shade above the lower end of the starting point the manual was calling for.

 

[buffybr]

Just because a loading manual or manufacturer's website does not list a certain bullet does not mean that bullet won't work, it just means that they didn't test it.

From the Hodgdon load data website:
7mm RM, 162 gr Hdy BTSP bullet, IMR 4831 powder
58.2 gr 2700 fps
61.8 gr 2877 fps 3.6 gr spread in powder weight

7mm RM, 166 gr Hdy A-tip bullet, IMR 4831 powder
60.3 gr 2796 fps
65.0 gr 3020 fps 4.7 gr spread in powder weight AND more powder for a 4 gr heavier bullet!

From Hornady 10th edition Reloading Handbook:
7mm RM, 150-154 gr bullets show the same powder loading data.

A 2 gr difference in bullet weight (166 - 168 gr) will not make that much difference when there is a 4.7 gr powder weight difference from the starting to maximum powder charges.

Just start low and work up, maybe 1/2 gr at a time, looking for high pressure signs.

 

[huntid73]

Different burn rate but not dramatically. H1000 makes a lot of sense to me-- best combination of case fill and performance based on Nosler's data.

I think I'm leaning to the H1000 for the next round of powder.

 

[huntid73]

Just because a loading manual or manufacturer's website does not list a certain bullet does not mean that bullet won't work, it just means that they didn't test it.

From the Hodgdon load data website:
7mm RM, 162 gr Hdy BTSP bullet, IMR 4831 powder
58.2 gr 2700 fps
61.8 gr 2877 fps 3.6 gr spread in powder weight

7mm RM, 166 gr Hdy A-tip bullet, IMR 4831 powder
60.3 gr 2796 fps
65.0 gr 3020 fps 4.7 gr spread in powder weight AND more powder for a 4 gr heavier bullet!

From Hornady 10th edition Reloading Handbook:
7mm RM, 150-154 gr bullets show the same powder loading data.

A 2 gr difference in bullet weight (166 - 168 gr) will not make that much difference when there is a 4.7 gr powder weight difference from the starting to maximum powder charges.

Just start low and work up, maybe 1/2 gr at a time, looking for high pressure signs.

Thanks! I was kind of thinking along the same lines - if powder manuf. doesn't have data, finding a close data point and starting there. Just dipping my toe into this process and know I can get down too many rabbit holes or bad situations if I don't pay close enough attention.

 

[WVmike]

Thanks! I was kind of thinking along the same lines - if powder manuf. doesn't have data, finding a close data point and starting there. Just dipping my toe into this process and know I can get down too many rabbit holes or bad situations if I don't pay close enough attention.

I just started the end of the 2023 and it was overwhelming when I started out. Just pick a powder/bullet that you can get on a regular basis and start from there. The loading manuals are just a guide as to what you should start with and not go over in most situations especially if you are new to reloading. Every rifle is different depending on the twist, length, so on and so forth.

 

[Wind Gypsy]

h1000 is frequently a good option. RL23, N565, H4831 are the others i'd consider.

 

[jeff_gibbons]

I’ve had good results with h4350 under 150 grs. With heavier bullets (160 & 168 gr) ive had good results with i7828, h4831, re22, h1000.

Pm me if I can help further and I can share the recipes that worked in my rifle

 

[Ballistic]

Retumbo... Retumbo. I've found almost no testing for either the .300 Win or 7 Rem. but Ramshot Grand has been very promising in my tests this summer.

 

[Huntkook]

IMR 4350 7mm rem mag 61.5 grain 150gr Barnes TTSX, that same load shoots well out of the Browning X Bolt and Christensen Arms FFT Ridgeline consistently.

 

[Gynaroo]

I use MagPro with 145 LRX

 

[jdf]

I use H1000 for mine. Really happy with results

 

[rtraverdavis]

If you can find it, I’ve had outstanding results with RL22 and 160 grain Accubonds. I’ve also had very good luck with IMR4350 and 140 Accubonds and Ballistic Tips.

 

[mtmuley]

If you can find it, I’ve had outstanding results with RL22 and 160 grain Accubonds. I’ve also had very good luck with IMR4350 and 140 Accubonds and Ballistic Tips.

RL22 and 160 Accubonds are magic in the 7mm Remington. mtmuley

 

[BuzzH]

RL-19 with 140 ETIP, IMR4831 with 160 Accubond.

Shoot within about 1/2" of each other in mine, IIRC, the 140's shoot about 1/2 inch left of the 160's.

 

[elevatorman]

H1000 works for a 7 rm. But its not the best. By best I mean fastest with good temp stability. Best powder i ever shot in mine was the 8133. Discontinued but proved slower powders are better for my 7 rm. Got a significant bump in speed. I have enough rounds for my 7 right now but an looking towards winchesters ball powders to get the velocity when I need to reload for her again. Grabbed temp stability might be a bit less than the 8133

 

[RevJim]

Congrats on Handloading! Learn all you can! I used IMR 4350 and IMR 4831 with 140, 150, 160. That was in 1980. I just now started using the new to me Ramshot Grand. It is "choc full" of energy! It reminds me of what R26 did with the .270! In my new rifle, a Fierce Edge, I could not get to the Hogdon Max of 72.2, I am settling in somewhere around 68gr with a 175. Its good for all the weights. I would try it before any other. Good luck!