Norma URP

[sewwhat89]

Does anyone have any reloading data for URP? I ordered some to play with, but I cannot find it listed on burn rate charts to know what it is similar to or any load data.

My guess is it is near 4320-4350 rates, but can anyone confirm this?

 

[uncleduke]

I have used quite a bit trying to find a suitable powder for heavy bullets in 308win. From my experience it burns slower than 4320 and very close to 4350.Could never get the velocity needed w/SMK 200's. I now use IMR 4007ssc.This powder seems to be ideal for the 30-06,300WSM.

 

[sewwhat89]

Good to know. I thought I might try it out with my 300 RSAUM and some 155-168 gr bullets. Right now in both of my rifles I am getting the best accuracy and velocity with Varget. I tried H4350 but hit pressure before I got to my Varget numbers. I have some IMR 4007ssc for the same purpose too. I figured it would be a bit slower and allow me to get better load density.

 

[uncleduke]

I have no experience w/300SAUM,but from my trials 4007 does'nt like jammed bullets. As far as burn rate it seems to be a tad faster than N550. So I'm trying it w/108 berger LTB's in 6MM BR.
My 4007 load w/SMK 200's is 44.8 @2550 in 308,compared to 42.5 of varget @ same velocity. Hope this gives you some help.