Thread: Guess the MV of the TMK 130gn

Originally Posted by Dead is better

Isn't that funny. You get less elevation clicks but the same windage.... so 1000y is the crossover point which the eldm is catching the Sierra 130gn. Interesting.

Here's the next question: Would the ELD-M catch faster crosswind from being lobbed higher than the flatter flying Sierra? I've heard that wind speed picks up about one mph per meter of elevation (from what you test on the ground)

I'm not sure, but wouldn't be hard playing around in a ballistics calculator. The higher BC of the 140gr should mean that regardless of wind conditions it will have less wind drift, the only way you can get the lower BC projectile to match it is with more speed, but in this case it's likely not possible to get the speed from your 6.5x55 that you'd need.

For a long range shooter the less elevation isn't a huge gain, as elevation is the easiest to accurately measure and adjust for, less wind drift is the biggest thing to aim for. BUT, in saying all that, if you are able to get the 130 TMK or a 130VLD/ELD doing 3100fps, the ballistics of the 130gr my be close enough for the distances you typically shoot out too.

This is all assuming that the BC of the 140gr ELD-M is actually .646.
Ballistics and the best bullet to use is a funny thing, and the best way to get a starting idea of what your gun will do is look online for other peoples loads and put them in a ballistics calculator. In your rifle the 140gr ELD-M may be the best choice, but someone else may have a short barrel .260 or a 6.5x47L and would find they lack the barrel length or case capacity to get the 140gr going fast enough, so the 130gr bullets would be a better choice.