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257 Roberts 100 gr E-Tip

 
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  #1  
Old 03-21-2010, 06:19 PM
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Join Date: Jan 2005
Location: Western MI
Posts: 716
257 Roberts 100 gr E-Tip

I quick tested the 100 gr E-Tip in my M700 Classic 257 Roberts and can share the following data with everyone.

IMR 4350 loaded to a Max charge with 41.5 grs, R-P case and Federal GM210M primers. Avg MV 2779 fps, ES 40, SD 20. Accuracy was 2.05".

RL 19 loaded to a Max charge with 46.0 grs gave an Avg MV 3053 fps, ES 38, SD 20. Accuracy was 1.772". The COL was 2.900" and I will have to work with this to improve accuracy.

I shot into water jugs at 100 yds, MV was 3042 fps and the bullet was recovered sticking out the back side of jug #5.



The recovered bullet weighed 98.7 grs and measured .584" diameter and the length is .635".

I will update with accuracy improvements.

JD338
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Old 03-24-2010, 05:33 PM
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Join Date: Jan 2010
Location: Central Maine
Posts: 117
Re: 257 Roberts 100 gr E-Tip

Thanks for the info! Always love seeing data on my 2nd favorite cartridge
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