H4350 and 110SMK 6mmCM
- Thread starter Roughneck47
- Start date
What kind of speeds you looking for?
The H4350 and RL16 are very close in fps to weights
Using Lapua brass and CCI 450's with the 110's 42.0+ will get you
about 3100+ fps .009 jump
Found the RL16 would give me a little more speed without the pressure as quickly as the H4350
I would start in the 41.0 range and work up. Nodes seem to be about .6g apart
depending on brass used and barrel length
The H4350 and RL16 are very close in fps to weights
Using Lapua brass and CCI 450's with the 110's 42.0+ will get you
about 3100+ fps .009 jump
Found the RL16 would give me a little more speed without the pressure as quickly as the H4350
I would start in the 41.0 range and work up. Nodes seem to be about .6g apart
depending on brass used and barrel length
was running 110s with H4350 in a 22" barrel and getting 3085 seated .020 off the lands with 44.5gr. Could have went higher but my accuracy has always been at the 3085 spot with 6creed. Would run this again if I built another 6 creed.
Sorry, but telling someone you put 44.5gr of H4350 in a creed case is a recipe for failure. That is 5K minimum over pressure.
42gr of H4350 .020 off the lands didn’t show high pressure but the primer was starting to flatten. I don’t think I would have gone past 43gr.
Tested to over 45gr without a single lick of pressure signs. He asked if anyone had luck and I did and worked up to it like a responsible reloader should. I see nothing wrong with sharing the information.
Ill check my OAL, kind of curious now. I had no crunch at that charge weight and just started to at 45gr. I dont like compressed loads so I stopped my pressure testing there.
I do have a longer FB of .183 and can seat long in AW mags...might be making the difference?
Functional
Longer freebore means much lower pressure with the same amount of powder ala Roy Weatherby.
If you look at the graph it shows well over 70,000 psi but if you read the text it says 63,000 so something is off 10,000 psi?
Longer freebore means much lower pressure with the same amount of powder ala Roy Weatherby.
If you look at the graph it shows well over 70,000 psi but if you read the text it says 63,000 so something is off 10,000 psi?
I believe that 63,000psi number is the max allowable pressure for the specific cartridge.
The 70k number is the actual projected pressure based on the load data entered.
