The 22 creedmoor thread

[Formidilosus]

Is the sierra ballistic coefficient for the 77tmk correct?
G1 .420
G7 .207

Yes.

 

[Formidilosus]

Still haven’t reached the point of testing myself, but I’d say no - I grab BC’s from the AB Quantum app before doing anything. They have G1 at .395 IIRC

If you use AB’s numbers, impacts will trend high.

.420 G1 has been spot on to below 1,400fps impact for tens of thousands of rounds.

 

[bielenbm]

If you use AB’s numbers, impacts will trend high.

.420 G1 has been spot on to below 1,400fps impact for tens of thousands of rounds.

Okay, that’s good to know! Now I just need to upgrade and get rid of POS Burris scope!

 

[bielenbm]

Any signs of pressure?

Not that I can see. I could probably push on it more but I don’t have a reason to.

 

[bielenbm]

Yes.

What is the 77s minimum fps needed for expansion?

 

[Matt5266]

Safest bet is to stay above 1800 fps