Originally Posted by BBerg
According to Quick Load there is one powder identical to Norma MRP and that is Vihtavuori 560.


According to this chart Vihtavouri 560 comes in at 145 but MRP and RL22 are 153 and 154 respectively.

I'm using Norma data with RL22 substituted for MRP in my 7x64 and it's working just fine.

Last edited by johnfox; 05/24/12.