New Zealand 300m Tack Driver Showdown (Lite)
- Thread starter Charf
- Start date
One of shooters at this event sent me this email today. I will post it on the TD6 thread as well. Sort of what Bart realised when he ran with his 6BRA.
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While I'm hav'n a cuppa just did some quick and rough numbers.
The 6mm 65g BT Berger has a G1 BC of say 0.28 and say the PPC guys are running that at 3400fps.
The 7mm 180g Berger Hybrid has a G1 of say 0.68 and say a 284AI is running that at 2850fps.
Using the above "loads" the wind drift at 300m with a 10mph full value wind is roughly 5" for the 284 and 11" for the PPC. Clearly that's just a datum wind drift value as there's all kinds of weird stuff gonna happen at TECT park in the wind.
Say a PPC is running at a 0.2moa precision level and the 284 at 0.3moa that gives a ballpark group value at 300m of 0.66" for the PPC & 0.99" for the 284, in zero wind.
That relative precision value difference between the PPC and the 284 will very quickly fade into insignificance in proportion to how tricky the wind gets ? Especially on a tricky range.
Food for thought from an Old Bastard
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While I'm hav'n a cuppa just did some quick and rough numbers.
The 6mm 65g BT Berger has a G1 BC of say 0.28 and say the PPC guys are running that at 3400fps.
The 7mm 180g Berger Hybrid has a G1 of say 0.68 and say a 284AI is running that at 2850fps.
Using the above "loads" the wind drift at 300m with a 10mph full value wind is roughly 5" for the 284 and 11" for the PPC. Clearly that's just a datum wind drift value as there's all kinds of weird stuff gonna happen at TECT park in the wind.
Say a PPC is running at a 0.2moa precision level and the 284 at 0.3moa that gives a ballpark group value at 300m of 0.66" for the PPC & 0.99" for the 284, in zero wind.
That relative precision value difference between the PPC and the 284 will very quickly fade into insignificance in proportion to how tricky the wind gets ? Especially on a tricky range.
Food for thought from an Old Bastard
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