freebird63
Well-Known Member
Right now I running 215gr bergers and 92gr IMR 8133 and getting 3140fps from the labradar. Using 215m primers. I have some N570 and RE33 to play with as soon as it warms up and drys out.
8133 or retumbo
- Thread starter Justin Todd
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General RE LEE
Well-Known Member
Sorry to bump an older thread but I was able to score on a jug of 8133 today. I hope this will work in my 7mm STW.
Justin Todd
Well-Known Member
Still haven't tried any 8133 in my 7mag found a nice load I like with RL 33 and 195 and stopped playing. Using the 8133 in my 300 RUM
You should be just fine & dandy, with 8133 and 160gr + bullets, once you find the load it likes.
General RE LEE
Well-Known Member
what about 140 grain bullets?
Run both Retumbo and 8133 in my 7 STW, 26 Nosler, 30-378 and my 300 PRC. Both perform excellent
Still should be adequate, if that's what you got, but I used H4831 for 140's.
Ckleeves
Well-Known Member
8133 in the STW with 140's probably won't be ideal it's a very slow burner. Now for the 180 class bullets it's probably one of the best.
General RE LEE
Well-Known Member
I'm super new to reloading. Got all the gear but no primers yet lol. What is the detriment of lighter bullets in slow burners? Slow velocity? Poor accuracy? Speed variations?
I agree I run 168 ABLR and 195 EOL IN THE 7 STW, 156 EOL in the 26 Nosler, 212 ELD-X and bigger in the 300 PRC and same in the 30-378
Low velocity, usually, the case will run out of space and not enough pressure, before it reaches a given velocity for the lighter bullet.
Ckleeves
Well-Known Member
Honestly it's hard to say without trying it. There are some cartridge/bullet/powder combinations out there that don't work very well on paper but produce excellent results.
Normally wild ES and slower velocity's are some of the symptoms of being outside of the ideal burn rate. That being said the STW case has enough capacity that you may be able to get enough powder in it to get good velocity before getting heavily compressed.
If you don't have a chronograph try to get access to one when you first start your load development. You will probably figure out real quick if it's going to work or not. As you work up your powder charge you should see a somewhat consistent increase in velocity per 1/2 grain increment (or whatever increment you step up) as you go up. It's not going to be a perfect 25 FPS for every 1/2 gr increment or anything but if (don't actually load these charges just a example) your chronograph looks like this:
79 gr = 3025
79.5 = 3050
80 = 3099
80.5= 3018
Then I personally wouldn't chase that bullet/powder anymore.
I know components are hard to come by but if my twist rate would allow it I would be on the hunt for some heavier bullets.
Data on imr 8133 is tough to find so I'll add my experience, hopefully it helps someone. I ran h1000 for a long time and got good velocity but supply was running low. For 7mm rem mag shooting 162 eldm Settled on 74.8 gr imr 8133 got me 3245 and still not pressured out. 26" proof 8.4 twist barrel
People keeps asking around here "What's the best powder?".
That's really easy for about 9 month's now, if you weren't around for the most recent powder shortage in 2017-18 and failed to supply -up...WHATEVER IS AVIAILABLE IN THE APPROPRIATE BURN RATE.
That's really easy for about 9 month's now, if you weren't around for the most recent powder shortage in 2017-18 and failed to supply -up...WHATEVER IS AVIAILABLE IN THE APPROPRIATE BURN RATE.
