.25 JSB KO's in Superior Heavy Liner

Just ran through a whole tin of them, tuning. Well I'll be damned! These are the most accurate slug I have shot yet out of my MKII with 700mm superior heavy liner, just barely nudging out the NSA 33 gr. 

Sweet spot for me is 965 fps (70.3 ft lbs), 1 ragged hole at 52 yrds, no fliers after firing 5 groups of 10. (benched bipod with: slug kit/pin probe, huma trans port, power plenum, Donny Ronin). 

Extremely happy with them! :D
 
Ok Ok ! Pics it is. 


My trusty (messy) tuning Station :

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52 yrd target with the JSBs 

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Chrony string with the 33.5 gr NSA’s, pretty much same result I got with the KO’s

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String with the FX Hybrids (these are cookin) 

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