155.5gr Berger transonic stability

[Quickoz]

G'day,

I'm wondering how the 155.5gr Berger Fullbore performs past 1000yds and when it hits the transonic zone? I don't have a copy of Litz book so I'm asking you fine gents here

Thanks.

 

[gyr2]

I had trouble with the 155 ( not 155,5) at 2650 ft/s, they were not making it past 900 m. Loaded them to 2750 and made it ok to target at 940m, no keyholing and decent group.All shots on target.

 

[Quickoz]

Cheers mate. What was your environments at that range? My load is around 2950fps i think based on drop but will confirm today with the club chrony.

 

[gyr2]

I was using density altitude. 1020.

I recall pressure being around 910 Mb. Altitude around 850m.Temp. some 15 ºC. Wind 4mph.

 

[Quickoz]

Cool, I verified my MV as 2880fps based on drop at 1000yds. DA 1980-2000, temp 85-90 deg F, 30.875MOA from 100yd zero. Grouped well in difficult conditions.