R16 slower than h4350?

[BoulderE89]

Yesterday I ran two ladder tests for 6.5 CM loads I’m working up for competitions. I’m going to retest in case I mixed them up but surprisingly the h4350 ran faster than r16. Again, my notes of how I arranged them in the box may be wrong so I’m gonna try it again, but has anyone ever had h4350 run faster than r16 in their loads?

 

[Supersubes]

Yes, depends on the cartridge though. What bullet, barrel length, charge weights?

I’ve found it safe to run at the same charge weights as h4350, but it’s not peaking out where h4350 is, and there’s frequently another 1-1.5 grains further to go for 16. In my 6cm with 115’s, equal charge weights produce velocities within 20fps of each other, with h4350 being slightly faster. Seen the opposite too.

Generally without lab test gear, hard to say slower, just different. They’re very close to one another though.

 

[Lunchbox27]

I stopped running RL16 for two reasons.

1. Lot to lot variance with velocity was very wide. I’m talking lot 1 had me at 40.6 grains for 2820fps, the next lot was 41.8 for 2820fps.

2. Carbon ring.

Still a great powder in terms of velocity/accuracy, just something to be mindful of. I went back to H4350.

 

[BoulderE89]

Yes, depends on the cartridge though. What bullet, barrel length, charge weights?

I’ve found it safe to run at the same charge weights as h4350, but it’s not peaking out where h4350 is, and there’s frequently another 1-1.5 grains further to go for 16. In my 6cm with 115’s, equal charge weights produce velocities within 20fps of each other, with h4350 being slightly faster. Seen the opposite too.

Generally without lab test gear, hard to say slower, just different. They’re very close to one another though.

In shooting 140 hybrid Berger’s out of hornady once fired brass in a Bergara hmr pro in 6.5 creedmoor. I think the barrel is 26” but could be 24”. I did 41.8-43.2 grains in .2 increments. The difference was about 60 FPS slower with r16 which really surprised me.

 

[Steel head]

Yes, depends on the cartridge though. What bullet, barrel length, charge weights?

I’ve found it safe to run at the same charge weights as h4350, but it’s not peaking out where h4350 is, and there’s frequently another 1-1.5 grains further to go for 16. In my 6cm with 115’s, equal charge weights produce velocities within 20fps of each other, with h4350 being slightly faster. Seen the opposite too.

Generally without lab test gear, hard to say slower, just different. They’re very close to one another though.

Similar experience in my 260 except R16 Gave higher speeds than H4350 with the same charge.

 

[BoulderE89]

Similar experience in my 260 except R16 Gave higher speeds than H4350 with the same charge.

That’s what I expected to happen