Supersonic Lee 200gr Load Data for 300 Whisper

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Supersonic Lee 200gr Load Data for 300 Whisper

09-01-2010, 11:15 PM

gds

Member

Join Date: Apr 2009

Location: NC< USA

Posts: 40

I am getting less than an inch at 50yds with all 3 loads with 4 rounds but a 5th one always opens it up bigger. The subsonic load with 1680 sometimes breaks the sound barrier.

I use water dropped wheel weights. Gaschecked, I lube with a star sizer using some old alox lube I got at an old gunshop. size to .310

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