Who's successfuly using imr 8133?

[Roughwater]

I've had good luck with 8133 in my 28 Nosler. Has been as accurate as Retumbo for me in the 28 but slightly slower burning. It is dirtier than Retumbo but I think it's meant to leave a residue. We have tried it in the 7mm magnum with good velocities and sometimes very good groups but other times just MOA groups but we haven't decided yet if it's the fault of the powder. It is bulky but I just tried it myself in a different 7 Rem mag with 26" barrel and got 3304 FPS (Magnetospeed) with 76.5 gn using a 143gn hammer hunter bullet (was using Winchester brass). Didn't see any bad signs of pressure but that was just a one round test so I could judge where to begin and maybe end a ladder test. I used a forester long stem funnel which helped keep the powder from coming up higher than the bottom of the neck. I already loaded up some cases to do a ladder test but the weather kept me in today but may try tomorrow.

 

[WYO300RUM]

This powder has been out for a little while. I have only heard of a few people using it. Some of those with success and some without great results. I'm just curious as to why It seems like it hasn't gained as much popularity as slower burn rate powders like retumbo & h1000. I have 4 different rifles that should favor it's burn rate. Could some of you fellows could share your experience with it? Good or bad.

Ive used in my 300 RUM and 6.5 PRC so for. Retumbo and H1000 shoot better in both. Velocity a little slower than Retumbo a max loads. It's not as slow burn as Retumbo wich I've been using for years now with great results in 300 Rum, Rem 7 mag and even in 243. Haven't ied it in 300 Win mag yet.

 

[Roughwater]

Ive used in my 300 RUM and 6.5 PRC so for. Retumbo and H1000 shoot better in both. Velocity a little slower than Retumbo a max loads. It's not as slow burn as Retumbo wich I've been using for years now with great results in 300 Rum, Rem 7 mag and even in 243. Haven't ied it in 300 Win mag yet.

What is interesting to me about 8133 is that in the 300 RUM it is Faster burning than Retumbo, but if you look at 7mm caliber loads it is clearly slower burning and more apt to get you higher velocity in 7mm Rem mag, 28 Nosler or 7mm STW than Retumbo. It is however faster burning in either caliber than 869 but likely less temp sensitive than than 869.

 

[DJ Fergus]

Ive used in my 300 RUM and 6.5 PRC so for. Retumbo and H1000 shoot better in both. Velocity a little slower than Retumbo a max loads. It's not as slow burn as Retumbo wich I've been using for years now with great results in 300 Rum, Rem 7 mag and even in 243. Haven't ied it in 300 Win mag yet.

Retumbo in 7mm RM with 160-180gr bullets is an awfully hard combo to beat. Seems like they are made for each other. I recently ran across a small reloading shop that had 10lb of n570, so I bought it all. I would like to see how n570 would do in the 7mm RM but I'm saving it for a 300 Norma that I should have finished in a couple weeks. Retumbo works so well in the 7mm RM that I can't hardly see any reason to try something different.

 

[Roughwater]

Retumbo in 7mm RM with 160-180gr bullets is an awfully hard combo to beat. Seems like they are made for each other. I recently ran across a small reloading shop that had 10lb of n570, so I bought it all. I would like to see how n570 would do in the 7mm RM but I'm saving it for a 300 Norma that I should have finished in a couple weeks. Retumbo works so well in the 7mm RM that I can't hardly see any reason to try something different.

I'd say no reason to change but since this post was about someone asking about 8133 I thought I might offer some limited info about that powder. I can't say that it worked any better in my 28 than Retumbo as it worked great too which is probably why many aren't jumping on it with both feet. But it does seem to offer slightly higher velocity in some calibers and is another powder that is not Temp sensitive.

 

[Hiwayman92]

Rumor has it that Retumbo is MIA and Hodgdon won't be producing any more for many months. N570 and N565 is MIA also. For these reasons I tried 8133, and it's been very accurate in my Piercision 300 Norma Improved, but then again, it shoots everything into one ragged hole at 100.. I need to test powders based on ES and groups at distance when I get time. I'm going to give H1000 a try and try CCI250's with 8133 to try and reduce my ES. If I can get the ES down, I'll probably buy an 8 pounder of 8133. I've heard some horror stories about fouling with 8133, but I can't say I've noticed an issue so far, after about 30 rounds or so.

 

[WYO300RUM]

What is interesting to me about 8133 is that in the 300 RUM it is Faster burning than Retumbo, but if you look at 7mm caliber loads it is clearly slower burning and more apt to get you higher velocity in 7mm Rem mag, 28 Nosler or 7mm STW than Retumbo. It is however faster burning in either caliber than 869 but likely less temp sensitive than than 869.

I don't know why either. Looking forward to try in my 7 rem mag. I bought some 869 for first time the other day to try in a few different calibers . So far have only loaded for 6.5 PRC. Haven't shot yet. I'm overwhelmed. I bought RL33 RL4000 IMR8133 and US869 at same time. Couldn't find RL26. Maybe good thing... Been satisfied with Retumbo for years. RL25 and 22 also.

 

[freebird63]

8133 is in fact slower burning than Retumbo. It's closer to N570 in burn rate.

To the OP. I'm using it successfully in my 300 RUM with 212 ELD-Xs at 3140 fps. It's doing quite well for me

Last year I tried some 8133 in my RUM and with 92gr pushing a 215 berger I was getting 3140FPS and awesome quarter sized groups at 200 yards, then fast forward to this spring when it was colder then the first time I tried it with the same primers, 92gr and same brass I was only getting 3025FPS. So I'm thinking it might be more temp sensitive then first believed. Guess I will go back to my N570

 

[Rhovee]

I lost 80 FPS from carbon fouling and 8133. Try cleaning it REALLY good and report back. Wouldn't be surprised if it speeds back up.

 

[WYO300RUM]

Last year I tried some 8133 in my RUM and with 92gr pushing a 215 berger I was getting 3140FPS and awesome quarter sized groups at 200 yards, then fast forward to this spring when it was colder then the first time I tried it with the same primers, 92gr and same brass I was only getting 3025FPS. So I'm thinking it might be more temp sensitive then first believed. Guess I will go back to my N570

92 grs. ? Was that max? I was using less with 185 and 190 Berger VLD

 

[Hiwayman92]

RHovee I'm another 20 rounds in on IMR8133 after today. I finally cut my SD in half by switching to CCI250 's from 215M's. Down to 7.8 now. 3150 fps with 91.5 grains. My barrel definitely sped up. When I ran my first Satterlee test 91.5 was 3102 fps. No sign of accuracy loss yet, but I'm probably only about 40-50 from a cleaning. I've only stripped copper in this barrel once, and cleaned twice I think.

 

[Deleted member 25294]

I'm in the process of load development for my 300 NM that I just finished.
Shooting 225 ELDM's, I tried Retumbo and got horrible SD and ES, 20 and 39, also hit pressure at 2950.
H1000 has pretty bad SD as well so far.

I tried out 8133 today and right off the bat shot .4 with 225 ELDM's @2925, SD was 11.
Nowhere near a max load so I'm going to look for the next accuracy node, so far it's impressing me.
I loaded another round with a higher charge looking for pressure, and hit 3010 with a slightly heavy bolt lift.
I'm using 215 GM primers, and Lapua brass.

 

[freebird63]

92 grs. ? Was that max? I was using less with 185 and 190 Berger VLD

Not sure if its max or not? just what I had worked up too. At the time was down to my last 2lbs of N570 and couldn't find anymore, so I started experimenting with 8133, but now I have plenty of N570, so will resume working on a load with N570

 

[Roughwater]

I did a ladder test yesterday using a 7mm rem mag, IMR8133, 143 gn hammer hunters, 215M primers and New Winchester brass. The brass I weight sorted so less than 1 grain spread, Neck sized only. Cases were trimmed within 002 of the recommended trim length. I used a forster long tube funnel to help compress the powder as 77 gn otherwise would be halfway up the neck of the case. I previously loaded up one round at 76.5 gn of 8133 to get some idea of where to begin and where to end the ladder test. 76.5 gn got me 3304 FPS across the magnetospeed. I then loaded 7 rounds in .3 gn increments starting at 75.5 gn up to 77.2 gn (the last round I just went up .2 gn). Hodgdon load data website says 78 gn is a max load for a 140 gn bullet, but this is actually a 145 gn bullet or nearly so anyway. (The test bullet I initially loaded of 76.5 gn showed a little flattening of the primer but otherwise no signs of pressure. Just to be sure before loading any more rounds I removed the primer from the fired case and installed a new primer and it installed normally with no sign of being loose so I assumed I could increase that load slightly without overpressure. After firing all rounds I noticed however that the scope had moved forwad on me at least a quarter inch which I don't imagine helped with accuracy in determing potential nodes.

In vewing the bullet hole locations in relation to the velocities I felt there could be a accuracy node at 75.7 gn and 76.8 gn. I based that on the fact that bullets 1&2 and bullets 5&6 were either touching or nearly so in both cases and the ES between both were very, very low. Especially between 1&2. Oh yes, All velocities were measured with the magnetospeed sport. For what it's worth the scope on it is a Nikon Monarch 5, 3-15X44 with the balistic reticle.

Here are the numbers:
1. 75.5 gn = 3287 FPS
2. 75.8gn = 3285
3. 76.1 gn =3306
4. 76.4 gn = 3330
5. 76.7 gn = 3331
6. 77 gn = 3339
7. 77.2 gn = 3342

Read more: http://hammerbullets.boards.net/thread/448/remington-magnum-hammer-bullet-elk?page=2#ixzz5mOBtGfXK