6.5-300 WBY load data

[TrapperBR549]

I am trying to help a friend come up with a load for his 6.5-300 with components I have. Using the Nosler 142grn. ABLR, I have H1000, H4831-SC, IMR-4350, also some stuff a bit faster but I don't think they would be appropriate.
I didn't see anything on Nosler or Hodgdon's sites so looking for suggestions.
If I can find something else in stock, what powder or powders should be my top choices?
Thanks!

 

[STOMP442]

I have messed with two of these now and both preferred H1000. I don't remember the exact loads off the top of my head but they shot the best around the 3100fps mark.

 

[chromatica]

H4831sc would be my choice for 140 gr 6.5 bullets. It is used in 260 Remington, 6.5-284, 264 Win Mag. You might have to compare case volumes to come up with a good starting charge weight.

 

[TrapperBR549]

Thanks. The only info I found was for lighter bullets. I was hoping one or the other would work for the 142's. I will look at 264 Win, I think they have similar case volumes.

 

[SRP Shooter 1]

I believe you will find the 300 WBY case to have considerable more volume than the 264. A case like the
7mm STW might be closer but not sure the data will get you any closer to where you want to be.
Try www.rifleshootermag.com
KS

 

[Kurz]

The powder I use most for the 140 class bullets is MRP 217. Cooler burning yet it yields good velocity.

 

[cnca]

I have 2 of these one factory an one i built. I was using 70+ grains of h-1000 and 70+ grains of retumbo with hornady 143x bullets and federal mag primers. Both shot very well at 3350-3370.

 

[TrapperBR549]

I have 2 of these one factory an one i built. I was using 70+ grains of h-1000 and 70+ grains of retumbo with hornady 143x bullets and federal mag primers. Both shot very well at 3350-3370.

Would 69 grains be a safe place to start? Not sure how light I can go without causing problems.

 

[cnca]

The gun i was using h-1000 in my load was 76.5 grains. the other is78.5 grains of retumbo. But those are my firearms. If using h-1000 start around 72 grains.

 

[DickE]

Found 89.0 gr of US 869 with 140 Berger hybrids, plenty of jump worked the best in one I built.

 

[cnca]

For information use in my 2 6.5x300's the 135 gr. berger over 3400fps never reached the target at 200 yards. Thats where i start my load development.