6mmCM vs .243 by Chuck Hawks

[Scorpio64 5,147]

Here is a good read by Chuck Hawks comparing two nearly identical cartridges.  It explains the technical differences in a way that does not make one feel stupid.  In other words, it is in plain language.

Abstract

Quote

 

This is another comparison that matches an established short action cartridge (the .243 Winchester) against a more specialized new short action cartridge (the 6mm Creedmoor) of similar performance. The reason for these recent introductions is in the realm of marketing, rather than ballistic advancement.

However, from the standpoint of a consumer looking for a new hunting rifle, there is a choice to be made. Hopefully, this comparison will help make such decisions easier.

 

Full article here --->  http://www.chuckhawks.com/compared_243_6mmCreedmor.html

The bottom line for me, though it was not specifically pointed out in the article, is that if you are going to invest in a PRS rifle for competition, go with 6mm Lapua if you are really looking to eek out that extra .01 moa.  Otherwise, just get a .243.  All the 6mm CM, or Lapua for that matter, does is allow the reloader to seat a longer (and heavier) VLD bullet in a case with a slightly shorter neck.  For the average non-competitor who will be happy with .5 to 1 moa, 243 makes the most sense as the rifles and ammo are far more cost effective. For example, a .243 Ruger American Predator Rifle will cost about 1/3 that of an entry level 6mm CM and off the shelf ammo is half the cost.   If you absolutely have to have .25 moa and reload (as most competitors do) and have a trust fund to bankroll your hobby, Creedmoor (or Lapua)  all the way.