300 Norma Mag and IMR 8133
- Thread starter Norcy
- Start date
I’m also interested in results with 8133. By all accounts it should be good. I’ve now heard of good results with VV N565 also, which is attainable at times.
I’ve shot 8133 and N565 in my Norma Improved with 215 Berger’s. I hit harder pressure at 3150 with 8133 than I did with 565 at 3240. However, the nodes look good with 8133 and everything landed within an inch at 100. More testing to come.
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Whats your barrel length?
Whats the fps at 93gr 8133?
Is this ryan pierce built?
Ty
I guess n565 and n570 still better?
Cooler and cleaner burn..too bad vv for magnum will never reach hawaii
Heck Bjay, it doesn’t even seem to be reaching the mainland! I’m liking the case fill with 8133 and it’s availability. The velocity flat spot was only 40 fps slower than the lower flat spot with 565. I need to get some free time to shoot both to check groups and SD’s. I think both will work fine. I won’t chase 50-100 fps if I’m scared to shoot it because I can’t find powder!
I posted my findings on FB 300 Norma Mag Shooters under Nodnarb Trecked.
I posted my findings on FB 300 Norma Mag Shooters under Nodnarb Trecked.
Yup i think i made comment there.(bjay gambeng)
Ryan has plenty 570 and 565 lol
Whats your fill for 8133? I think our improved from ryan will start compressing around 94gr
Thanks Norcy,
Please update with Velocities and SD'S when you have finalized. I will be loading 8133 in my 300 norma, 28 nosler, and .338 Norma soon. Have loads for N570, but like others I can't locate any. Have loads for reloader 33, but didn't like what I saw when I did a temp stability test. 1.22 fps per degree of temp change. The N570 was .13 fps per degree of temp change.
Please update with Velocities and SD'S when you have finalized. I will be loading 8133 in my 300 norma, 28 nosler, and .338 Norma soon. Have loads for N570, but like others I can't locate any. Have loads for reloader 33, but didn't like what I saw when I did a temp stability test. 1.22 fps per degree of temp change. The N570 was .13 fps per degree of temp change.
I've got a few pounds of N565 to try out in my 300 NM with 225 eldms.
Have you by chance tried it with anything heavier than 215s?
I've just started load development but so far it's looking like H1000 isn't going to get me over 2900 in my 26" barrel without pressure, same with Retumbo..
It's throated out too.
I’m dialed in with my Norma Improved also. 91.5 grains under a 215 Hybrid at 3150 fps. CCI250 ‘s cut my SD’s down into the high single digits finally. Federal 215M’s wouldn’t cut the mustard. We found a nasty runout issue with the Custom Whidden dies, so I’m waiting for the custom dies from Hornady to get built for Ryan Pierce. I guess it must be an accurate gun when it shoots one hole with bullets with 5-8 thousandths of runout!
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I will try the cci primers, that might be the trick to getting mine down as well. I will now start to play with the seating depth to see if the groups will tighten up as well. Thanks to everyone for the information and If you don't mind keep me informed on the progress of your 300 norma mags and other possible load data.
I’m about to load some 8133 in my 300 NM. Curious to hear what charge people are ending up with using the 230’s? Yes I’d love to try RL-33 but I don’t have any, don’t know anyone that has any and it’s not in stock anywhere. Just looking for a good place to start my load work up
I ended up around 90 grains with 225's.
I'd start at 85 and work up.
That’s where I ended up starting. Actually started at 84.0 and gonna go up to 90.0 gn unless it won’t work that high
Shooting one of Ryan's improved builds I'm at 89.5 of imr8133 and 3000fps with 230 atips. 0.3 moa at 200yds I took it up to 90.7 and 3120fps but had some heavy bolt lift. 90.3 to 90.5 was a good node at 3100 fps but intermittent heavy bolt lift. Next node down was at 3000 fps. i have some n565 on the way so I look forward to trying it with some berger 215s when Ryan has them in stock.
I am at 88.9 grains of 8133 in Lapua brass pushing 225 ELDM's at 3037 with single digit SDs. I need to go out and shoot some groups with it though. I inly have like 50 rounds through my rifle.
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