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Old 05-29-2005, 03:18 AM
Gos Gos is offline
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Join Date: Mar 2005
Posts: 17
The Speer 150gr. RNSP should expand just fine in the 300whisper. The bullet was made for low velocities in the 1,800fps area. My own pet load for this bullet is:
Winchester SR primer.
H110 Powder 18gr.
COL. 2.01"
2,000fps
1,320 foot pounds.

I DO consider this to be a top end charge of powder. Each gun is different, so creep up on this load data and watch your own pressure signs. This is out of a 16" AR15.

Gos.
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