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Norma powder for 270win. 204 or MRP

 
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  #8  
Old 03-12-2014, 04:31 PM
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Location: Chuckey TN
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Re: Norma powder for 270win. 204 or MRP

Thanks for the help guys! I'm glad I have some good possible replacements.

Quote:
Originally Posted by royinidaho View Post
I've been around the horn w/the 270 Win.

RL-22 is Norma 205 ithat has skipped a ton of QC checks.

Rl-22 is very temp sensitive.

MRP replaced N-205. I understand MRP has been replaced by N-217. . . .??

Allianz 4000MR seems fairly available in my area. Don't know about your area...

4000 puts the above mentioned hands down!!!

IMR 7828 ranks up there pretty good also

Just my experience with my Winny
Roy, I'm glad you mentioned 4000mr because it is available. Do you have any load info that you've came across? I wasn't able to find a lot. If it works out for me, it'll save me about ten bucks a pound.

Chris.
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  #9  
Old 03-12-2014, 09:52 PM
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Re: Norma powder for 270win. 204 or MRP

Chris,

My records show 54.9 gr. PP 4000 MR for MV of 3190 FPS out of a 27" Lilja bbl.

Bullet is Berger 140 VLD - Hunting (277140V) seated Base to 0.277 ogive using a Sinclair nut.

Ran her up 3300 w/o problems but what's the sense in that? She's just 270 Winnie.

Besides she shoots too good to waste bbl life.

Hope this helps.
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  #10  
Old 05-14-2014, 07:11 PM
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Re: Norma powder for 270win. 204 or MRP

has anyone used the norma mrp powder in the 7mm mag. looking for some load data. right now loading 64.5 grains with 180 bergers vlds. not sure of speed yet as I have yet to chrono.
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  #11  
Old 05-14-2014, 08:05 PM
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Re: Norma powder for 270win. 204 or MRP

Quote:
Originally Posted by swandoggle View Post
has anyone used the norma mrp powder in the 7mm mag. looking for some load data. right now loading 64.5 grains with 180 bergers vlds. not sure of speed yet as I have yet to chrono.
Weatherby factory ammo uses MRP up to the .300 Wby. When you step up to the .378 Wby based calibers, I'm pretty sure they use MRP2. Norma loads Weatherby factoey ammo, and also makes the factory Weatherby brass.

So, I would say you should have no problems with MRP in a 7mm RemMag...Especially since the burn rate is right next to 22, so close I would say load data might even be interchangeable.
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  #12  
Old 10-22-2014, 01:44 PM
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Re: Norma powder for 270win. 204 or MRP

I use 61.0 gr of MRP with 130 gr. Nosler Ballistic tip bullets in Winchester brass with Rem 9 1/2 primers in my Winchester 70 XTR Featherweight in .270Win. I get MOA 100 yard 3 shot groups Velocity is 3070 fps out of the 22" barrel. Case life is good as is primer appearance. No sticky extraction. Don't know if MRP is still available but I bought a case of it cheap about 15 years ago from a dealer that couldn't sell it. My brother has had good results in his .300 Weatherby.
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  #13  
Old 10-23-2014, 08:36 AM
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Re: Norma powder for 270win. 204 or MRP

It is true, RL22 is leftovers that did not meet the standards to be labeled as MRP, 205 was so close to MRP that there wasn't any sense in keeping both. MRP2 is also a "high quality" RL25, 217 is not a replacement for MRP2, test have shown 217 to be slower than Retumbo, right on par with VV N170 but not quite as slow as N570. Norma 204 is RL19 without the "bad" characteristics of 19, it's a good powder for 130s in a 270 win, but for 140s and up MRP is a better choice. PP4000MR is basically a reformulation of the ball powder we know as Ramshot Hunter just in a smashed extruded form. Personally I'd look for some H4831sc, but that's just me. Good luck.
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