IMR 8133

[Hiwayman92]

In my 300 Norma improved pushing 215 Berger's in Lapua brass, 8133 came up short of VV N565 in velocity before pressure. I had more pressure at 3150 than I did at 3240 with N565. However, the velocity flat spot was only 40 fps slower. Everything grouped well over a 4 grain spread, and a .5 grain spread had an ES of 2, so it still looks promising.... especially since it's relatively available. More testing to come.

 

[odoylerules]

Well IMR-8133 isn't gonna be an option for my 338 terminator
(338 Lapua improved with plus P throat)
I started my test loads at 103.0 grains, pushing a 300 grain Berger Elite hunter.
**All loads had a stiff bolt lift.**
103.0- 2998fps, 3008fps, 2975fps.
104.0- 3019fps
105.0- 3034fps
Testing discontinued...
This powder doesn't produce desired speeds and showed pressure signs throughout
(For comparison RE-33 at 109/110grains were 3060/3086fps respectively with no pressure signs)

 

[rpierce]

Well I did a powder charge test in the 300 norma improved with 8133 and 230 bergers .022 off the lands w cci 250 primers and lapua brass. Very promising so far. Several nodes. I cycled the bolt with one finger to better see when I got a bolt click. At 3025 fps it just barely got a faint click. There was a node at 3000 fps so I loaded 3 rounds up and shot them. ES of 10 and .240" @ 100. Loaded another 3 up and shot them at 400. There was a slight breeze but it held 1 1/4" vertical. Total of 10 shots to find that load. Not the fastest powder out there but it shot great with minimal testing. Even the 84 gr cupcake load at 2750 fps to get a velocity baseline with and foul the clean barrel shot a bughole. This barrel has about 600 rounds through it right now and is still driving tacks. Throat doesn't look bad at all.

 

[Mooseknuckles]

Anyone using this powder in 338 lapua with 285 eldm or 300 Berger's?

 

[David M]

338-378 IMR8133 and H1000 updates: 270 grain ELD-X bullets Fed 215 primer

H1000 105 grains 3003fps, 2982fps, 3044fps sub moa and if the shooter could shoot I think this may be a "cloverleaf" load. 2 out of 3 touching at 100yds. No signs of pressure CAOL 3.826 to 3.833

IMR8133 109 grains 2969fps, 2943fps, 3016fps there was a minor extractor mark on this last shot. This load was almost 3 shots in the same hole, it seems very accurate.
COAL 3.826 to 3.833.

Both of these loads need to have the COAL reduced by .020 or so for proper feeding from my magazine, hopefully that won't screw up my accuracy and I'm assuming that I will have to reduce powder charges a little to accommodate the case volume reduction. The loads are showing good accuracy (hunting) and I'm now pretty hopeful that the rifle will satisfy my goals.

More to come,

Dave

 

[Elkheart]

338-378 IMR8133 and H1000 updates: 270 grain ELD-X bullets Fed 215 primer

H1000 105 grains 3003fps, 2982fps, 3044fps sub moa and if the shooter could shoot I think this may be a "cloverleaf" load. 2 out of 3 touching at 100yds. No signs of pressure CAOL 3.826 to 3.833

IMR8133 109 grains 2969fps, 2943fps, 3016fps there was a minor extractor mark on this last shot. This load was almost 3 shots in the same hole, it seems very accurate.
COAL 3.826 to 3.833.

Both of these loads need to have the COAL reduced by .020 or so for proper feeding from my magazine, hopefully that won't screw up my accuracy and I'm assuming that I will have to reduce powder charges a little to accommodate the case volume reduction. The loads are showing good accuracy (hunting) and I'm now pretty hopeful that the rifle will satisfy my goals.

More to come,

Dave

Did you stretch it out past 100 yards? I'm running 30-378 Roy and used 94g of H1000 with 230g Berger Hybrids. Shot great at 100 yards. With 1/4" moa. Just went out to 300 yards and 411 yards and my grouping went to hell. Gonna run IMR 8133 in my next batch.

 

[David M]

Did you stretch it out past 100 yards? I'm running 30-378 Roy and used 94g of H1000 with 230g Berger Hybrids. Shot great at 100 yards. With 1/4" moa. Just went out to 300 yards and 411 yards and my grouping went to hell. Gonna run IMR 8133 in my next batch.

I haven't yet. I stopped working on those loads when I got busy earlier this summer and haven't had a chance to keep going. I did get some Barnes LRX 280 bullets and want to try them as well, I hearing really mixed reviews on the ELD-X bullets???????

That seems really goofy that you are seeing tight groups at 100 and at 400ish yards your flight path is getting wonky. Maybe someone smarter than me will chime in with some helpful wisdom.

Cheers,

Dave

 

[SilverbulletMAG]

That seems really goofy that you are seeing tight groups at 100 and at 400ish yards your flight path is getting wonky.

Optics, fundamentals, wind, etc. start to play a bigger role getting out there 400+. That would be my first guess at least or there are some really bad SD's (velocity swings) perhaps? Just speculating...

 

[Elkheart]

T

Optics, fundamentals, wind, etc. start to play a bigger role getting out there 400+. That would be my first guess at least or there are some really bad SD's (velocity swings) perhaps? Just speculating...

Found out when the scope was originally mounted it was canted. Reset the scope. Did a ladder with some IMR 8133 103g, 104g, and 105g with Berger 230g Hybrids. Bolt was a little stiff at 105g. 104g shot well, but 103 were a little better. Chono'd the 103g and had SD of 7.3 with ave velocity at 3000fps. Couldn't ask for better groups with factory gun. Fit 3 shots in a quarter sized group at 100. 500 yards were within a 2" to 3" group. I'm happy with the load and will be my go to for the opener this Saturday. All brass has been is on its second reloading.

 

[Calvin45]

Like what I'm seeing with imr 8133 in my .300 win mag. I've posted about my findings but in brief I'm using hbn coated 225 eld bullets in win brass with fed215m primers. Very compressed, 3.56 coal, settled on 79.0 grains, but up to 80 saw no pressure signs of any kind. But velocity plateaued around 78.5, going up to 80.0 only increased velocity by 30 FPS or so, so I went for 79.0, wiggle room, in the middle of a node. One hole 3 shot group at 80 yards. Have only gone out to 400 so far, but it's doing great. 2760 FPS which is slower than Hodgdons data would predict but perfectly acceptable to me, it's still 3800 foot pounds which is typical 300 win power. I may try the 7977 and h1000 I have stocked but the 8133 is really working awesome and I don't see any reason to play with the others and fix what ain't broke. It was right around 0 celcius when I chronoed so i plan to chrono again on a cold day in January (there will certainly be some well under -30 c) and a hot day in June or July next year (there will certainly be some over +30c) and see to what extent it truly is temp insensitive. Living where I do gives great opportunity to test the temperature claims, there's not to many places that swing so extreme from summer to winter. Last February we had days where at 11am it was still -42c (pretty close to Fahrenheit here, -43.6f) and in June got up to 32 c, 94f). I don't feel like going out and shooting in either of those (and I'm sure to some of you in places like Texas and Arizona that doesn't even count as hot yet but I absolutely can not cope with heat, complete baby about it, everyone else here complains in winter, I complain during the summer, I hate it ! ) but in the name of science and shooting I'm going to try and get out on those kind of days and really put the enduron powders to the test!

 

[cmcilmoil]

I've just started working up a load for my MV in 338-378 with 270 grain ELD-X bullets. I hit pressure signs with 106 gr or H1000 and so far with 8133 I have not found the pressure limits and am over 3000 fps with a stock Accumark 26" with the Accubrake on it. I can't remember exactly what my charge was, I'll check tomorrow but it's less than what the books are showing for 265-285 grain Barnes bullets. I haven't found any really good 270 grain ELD-X data so I'm "starting low and working up". My POI change quite a bit from H1000 to 8133 with similar velocities.

Dave I know this is an old post but did you ever get the eld-x loads to where you were happy with them? I am looking at trying them in mine...thanks

 

[Lonewolf74]

I wanted to bring this thread back up to see if anyone has played more with 8133 and the type of results you got?

 

[willfrye027]

I wanted to bring this thread back up to see if anyone has played more with 8133 and the type of results you got?

Similar to retumbo in my 25-06. A touch slower, actually a little better velocity on top end. Pretty bulky. Have not tested beyond a ladder test.

 

[Lonewolf74]

Similar to retumbo in my 25-06. A touch slower, actually a little better velocity on top end. Pretty bulky. Have not tested beyond a ladder test.

Good to hear. I'm hoping to get my hands on some and test. I would like to have an option besides N570 cus part of me don't like relying on a powder that's usually hard to get and the prospect of 8133 being easier on throats don't hurt either