Cartridge

Approximate Water Capacity

Increase from 243 Win

Increase from 6mm Rem

Increase from 243 AI

243 Winchester

52.8gr.

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--

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6mm Remington

54.9gr.

3.8%

--

--

243 Ackley Improved

56.9gr.

7.2%

3.5%

--

6mm Ackley Improved

60.0gr

12%

8.5%

5.1%