Range Report 140 SMK .264 BC on G7 Scale

[gasrat]

I know Sierra doesn’t do the G7, rather G1. But I’m trying to find the G7 BC of a 140 SMK for a 6.5 CM. I called Sierra and he gave me a number, but didn’t sound confident on it. Just looking for additional verification. Anyone happen to have that info logged in a data book anywhere? Thanks.

 

[gasrat]

Guess no one has this information stashed away.

 

[ShtrRdy]

In one of Brian Litz's books be shows a G7 BC of 0.301 for the 142 gr SMK.

 

[canezach]

Try 0.272

 

[gasrat]

Try 0.272

Thanks for the info.

 

[gasrat]

In one of Brian Litz's books be shows a G7 BC of 0.301 for the 142 gr SMK.

Info needed is for 140, not 142. But thanks.

 

[canezach]

That 0.272 should put you really close. You might need to tweak it a little, like plus/minus a 0.001 or 0.002

 

[gasrat]

That 0.272 should put you really close. You might need to tweak it a little, like plus/minus a 0.001 or 0.002

I ran it today at .271 and it was on. The match today was 578 max yardage, but the data was good out to that range.

Will attempt to shoot it out further to check it when I get a chance. Thanks to all that replied.

 

[b6graham]

I ran it today at .271 and it was on. The match today was 578 max yardage, but the data was good out to that range.

Will attempt to shoot it out further to check it when I get a chance. Thanks to all that replied.

You can probably be pretty far off on BC and be fine sub 600y. I'd look at 800-1200 if possible

 

[Themagundaog]

Right or wrong?

 

[Steel head]

You can probably be pretty far off on BC and be fine sub 600y. I'd look at 800-1200 if possible

Yep!