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Factory 123sst ballistics at sea level using 20” barrel?

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Factory 123sst ballistics at sea level using 20” barrel?
JuanC Offline
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#1
05-01-2018, 03:35 AM
Just purchased a 20” Satern cut rifled barrel. Does anyone know what kind of ballistics the 123grn sst would be at sea level. I’m 10 ft above sea level currently.
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BluntForceTrauma Offline
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#2
05-01-2018, 04:02 AM
I've got an 18" Satern cut-rifled and it's a bit faster than average.

If Hornady specs their 123 SST at 2580 fps from a 24", and if you lose 100 fps average every 4 inches, that would put you at 2480, but given a Satern cut-rifled fudge factor I'd guesstimate your expectation at 2510?

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