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Old September 11, 2012, 03:23 PM   #7
Wyoredman
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Join Date: September 6, 2011
Location: Wyoming
Posts: 1,350
I think I would start at the lower end of the 150 gr load in your Lyman manual and start experimenting. I would also look at the 160gr load listed and make sure I din't exceed that max or load below that minimum. Try out a few in your rifle and then make a decision if you can increase charge weights a bit.

Looking at IMR 4350 data:

- 150 gr Nosler Partition min is 57 gr and max is 60.8 gr

- 160 gr Nosler Partition min is 56 gr and max is 59.5 gr

Since your RN bullets have a different profile and are 154 gr, I would start at 56.0 gr and work up to around 60.0 gr. Stopping if the bolt starts to get hard to lift or the cases start showing signs of pressure. There is an excellent thread about pressure and cases here someplace.

You may find that you can go beyond 60.0 grains of IMR 4350, to 62 gr or so. Work up and find a good load with those bullets.
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