Range Report 375 rocky mountain bullets BCs

[jmason]

Can Anyone out there validate the BCs on RM 375 bullets? Seems odd that they all have the same BC. I do know that the BC on the 338 /325gr is too high. The 375s are posted as being lower but still don't look quite right.

 

[Colcalcipherol]

The 375 grain is .938 and the 370 grain (no longer in production) is .926. The 350's are somewhere around .9, or just a hair below, but I don't recall exactly what. The 338 BC was calculated from drop when fired from the .408 wildcat cartridges so extremely high velocity. Or so this is what I have been told . . . I have several of the 375 grain RM's but I have yet to confirm the BC so I don't know how true it is. At worst, it should be quite close.

 

[jmason]

Thanks for the response. That still seems high though. There's gotta be some folks out there using these with some substantive information. I don't know what the 338 BC is, but I will.... I'm pondering going 375 chey tac from 338 (current). Trying to determine if it's worth the effort and expense.

 

[milo 2.0]

I shot the 338- 275gr RM out of my snipetac. Comparing it to the 300gr Berger's bc, it was substantially higher, flew way better.
I have no way of determining actual bc's, just what I was able to witness shooting the 2 side by side. IMO, they're close to stated bc.

And according to a drop chart off exbal, the numbers matched up better with the RM. My target that got the most attention was set at 2073, on a hillside where spotting POI was easy, the diff in number of hits weighed in heavily in favor of the RM. At 2k plus yards, a 2mph variation in wind makes a diff between hit and miss.

 

[jmason]

come on guys I know folks are shooting these or he wouldn't be making them.

 

[jmason]

come on guys I know folks are shooting these or he wouldn't be making them.

Is there somewhere else I should have posted this?

 

[one shot ST]

I've ordered some Rocky Mountain .350 gr.....the last November 2013.....still waiting, I'm very disappointed..