by SCJ429 » 22 May 2018, 11:01 pm
I understand your reasoning that the BR4 work well for you, as they do for me. I had a quick look at the Precision Rifle Blog who report on PRS shooting in the US. The 6.5 Lap and CM are used widely by these guy and they reported on the equipment list for the top 50 for last year. 14 shooters in that group used CCI 450 and seven used BR4. None of these guys are using Retumbo so I assume they are getting great results over and above the BR4 in their competition rifles chambered in 6mm or 6.5mm cases using something around the burn rate of Varget. If I was to start a load for a 6.5 CM, my current experience is zero with this cartridge, I would use a 140 Berger hybrid with some 2209 and a CCI 450 and see how it shoots. That is not to say you wouldn't outshoot me using 2206 and BR4, I would love to know if someone has tried and what they found.