I'd like to know anyone's thoughts on the NORMA MRP Powder. Never used it myself. Since RL22 cannot be found, I gotta get something for a 7MM Remington Magnum that I only shoot 168gr Bergers out of. The Burn Rate Chart shows it is right there with RL22 but I have no idea how it performs, let alone how it'll perform for my needs.
Norma mrp
- Thread starter 1J04
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Thx man.
I have read the same thing as what Turbo said, it's supposed to be relatively the same thing. The only difference that I've heard is that MRP is supposed to have tighter manufacturing tolerances than RL-22 does. I have been searching everywhere for RL-25 to shoot my 300 RUM with the Berger 230 OTM's(also impossible to find). So I looked up suitable powders in the Berger manual and this MRP powder sits right next to RL-22 in the book. The RL-22 max load is 79.0 grains at 87% case capacity and the MRP is 79.5 grains at 85% capacity. They shoot 2751 fps and 2760 respectively. I figured what the hell, can't hurt, so I ordered 5 pounds of it off of Midsouth Shooters.
Now, since I can't find the 230 grain Bergers, I bought the Sierra 220 grain SMK's to try, and while the Sierra manual doesn't list MRP powder for the 220's, they do list RL-22. I'm going to work up a secondary load using the RL-22 info starting a few grains below the max with the MRP powder and see what I can get. Advertised speeds with this lighter bullet are around 2850-2900 so that's exciting.
Now, since I can't find the 230 grain Bergers, I bought the Sierra 220 grain SMK's to try, and while the Sierra manual doesn't list MRP powder for the 220's, they do list RL-22. I'm going to work up a secondary load using the RL-22 info starting a few grains below the max with the MRP powder and see what I can get. Advertised speeds with this lighter bullet are around 2850-2900 so that's exciting.
Turbo: Yeah, this comparison is getting more and more attention obviously due to the overall lack of RL22. I suppose as always, load it up and test it. Proof will be in the Pudding right.
Apothus: I was looking at the same info in the Berger Manual. I think you're onto something there with working up the MRP close to the RL22 load data. I'd like to know what ya end up with when ya stuff those 220's ! Let me do some checking. I very well may beable to find some 230 OTM's. I'll check and get back to ya.
Crap, they're 250gr OTM for .338 that a buddy has.
Apothus: I was looking at the same info in the Berger Manual. I think you're onto something there with working up the MRP close to the RL22 load data. I'd like to know what ya end up with when ya stuff those 220's ! Let me do some checking. I very well may beable to find some 230 OTM's. I'll check and get back to ya.
Crap, they're 250gr OTM for .338 that a buddy has.
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I use it my .280 ackley, it's burn rate is a touch slower than 22 is. It seems so far to be very temperature stable and meters very consistently.
