Speer manual #13 gives a minimum of 5.0 and a maximum of 5.6 with W-231. It was the lowest velocity load they showed. 765 FPS - O.A.L. 1.200
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Blue Dot gave 893 - O.A.L. 1.200
minimum 8.1 and maximum 9.0
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Power Pistol gave 881 - O.A.L. 1.200
minimum 6.3 and maximum 7.4
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HS 7 gave 849 - O.A.L. 1.200
minimum 8.5 and maximum 9.5
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N340 gave 836 - O.A.L. 1.200
minimum 5.4 and maximum 6.1
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I would suggest investing in the Speer #14 manual.