198 Flatlines in 300 NM

[Speedarino]

Any new recipes/data?

 

[Bravo6niner]

@Gilly might have a bit of info

 

[Speedarino]

Thank you for the follow up. What are your current load recipes including COAL. Where are your nodes and what twist?

 

[Gilly]

I’ve run them in a 9 twist 28” barrel with RL26 and OAL of 3.765 as Warner suggests. Was up over 3100 with accuracy node and I’m faster before max load.

 

[Speedarino]

Thank you for the info.

 

[Clearlight]

I’m running an improved version so not apples to apples, but I got just over 3100 with
87.4 of AR2217 @ 3.850 OAL. Haven’t got a 30 Cal olive tool deep enough to measure
BTO at this time. Groups around 0.4, not quite as tight as my 230 Hybrid load but I
didn’t do a lot of seating tests due to projectile cost.

 

[Speedarino]

Thank you for more good info! Are you shooting Berger’s on top of Flatlines

 

[Clearlight]

^^ I have a tune for 215 and 230 Hybrids, 230 groups best and is my favourite conventional
bullet for over a mile. Inside a mile the 215 is flatter and wind is a wash. No issues with barrel
fouling shooting both bullets without cleaning between if that’s what you mean?

 

[northern50]

87gr H1000 in my 300nm imp. With 190gr badlands solids shoots like a house of fire. 3208fps with zero pressure even at 100degrees f ambient. I’ll turn the speed up a little, haven’t had any time to load test, just running what I know works.

 

[Speedarino]

Thanks again

 

[bjay]

Anyone tried them with retumbo

 

[kthomas]

Anyone tried them with retumbo

I don't think it's fast enough, not from my testing anyways. I think I got pressure around ~3000 fps (28" 1:8 twist Hawkhill). Will have to check my notes to get an accurate velocity.