6Creed vs SLR/243

[jrbet83]

With running the heavies (105+) , the SLR/243 guys are almost all running slower powders like 4831sc, h1000, n160, and n165, to get barrel life.

But 6mm Creedmoor guys are mainly running 4350 and rl16, which would be considered to fast and hot for the similar SLR/243.

Any explanation for this, other than 4350 was the go to for the 6.5, so it was the natural step for the 6?

 

[Possumpete]

I personally am running R26 and right or wrong it works on my rifles. Haven't had to swap barrels out on either 6 creed yet,but interested in seeing how long they go with R26. I am running 105s in one rifle around 3120 and in other rifle 3200+ .

 

[redneckbmxer24]

I used to always run H1000 in my 243's with 26" barrels and always got 3130-3150fps with 105's. My last barrel I got was just slow with H1000 for some reason so I used H4350 which still didn't get the velocity like I'm used to but was 100fps faster than H1000. The barrel lasted to almost 1800 rounds before it slowed down any but there was a ton of throat erosion compared to the barrels with H1000 and I was having to tweaking my load every 250-300 rounds because of strings opening up and getting unexplained flyers at distance. Kinda a PITA IMO. I never had to do that with a 243 barrel running H1000. Now I know this is just a sample of one 243 barrel running H4350 but the load always tightened right back up after powder and seating depth adjustments were made. I've noticed finnicky loads and adjustments in every rifle I've run H4350 in so I'm not convinced it's the end all be all powder for 6/6.5 like most seem to think. I actually chalked 6mm Creedmoor up as a finicky round but looking back on it now it was possibly actually the powder. I've always gotten my best and most consistent results when the burn rates have been a little on the slow side for whatever I'm loading.

The H4350 loads certainly do have a lower recoil pulse than H1000 though, probably a combination of the charge being over 5gr less and the faster burn. H4350 also doesn't foul nearly as bad as H1000 and doesn't leave as much crap in a suppressor.