300 PRC Hammer 199 Retumbo/N565

[Recon$$]

Not looking to beat a dead horse but good old google didn't have much for me.

I'm screwing around with these two powders and 212 ELDX. I think I found a 1/2 MOA load but I just ordered 50 199 gr HH. I'm going to give them a try before I settle on a load.

I have N565 and Retumbo, anyone got pointers, experience etc.. with this combo? I got h1000 but like 1/2 pound so for the time being its basically out.

Rifle is a 300 PRC 24" 1:9

Thanks

 

[nwmnbowhunter]

Either will work. Use whichever you have more of.

Start at 75gr and go up in one grain increments.

Try shoot it at a longer distance. I like over 400.

Stop when you reach bright ejector marks.

Look at ladder and you will see a node or two.

My 26 inch 9 twist likes them just over 3100fps with RL 26 and N570.

Post your results and we will help you out.

That bullet is a killer.

 

[Recon$$]

I will post some results when I get my hands on them. I usually start. 01 off the lands and don't touch seating till I find the velocity node. I know a few on here claim seating isn't a big deal with these guys, what's yours experience there? I'm looking to figure these out hopefully in 1 range session.

 

[nwmnbowhunter]

Look at the hammer hunter load data.

3.63 coal was perfect for my chamber. 0.01 off lands in my chamber and it shot so well i never adjusted seating depth

 

[Recon$$]

Well, I shot a a short ladder test between 74 gr 76 of N565 and all my groups were between 1" to 1.5". I loaded them .01 off the lands. No groups that gave me any hope, little disappointing. I setup a ladder test with retumbo but I got alot of pressure into the second group and a 2" spread so I just canned that ladder test. I'll have to start lower if I revise that. All under book maximum.

 

[WYOHTF]

I've never loaded for the 300 PRC but you last post left me wondering if 1 gr. increments maybe let ya miss a node.
Retumbo might need a heavier bullet too

 

[Recon$$]

I did .5 increments.

 

[WYOHTF]

I just reread your OP
You are already shooting a heavier bullet.
Sorry

 

[Nomosendero]

I've never loaded for the 300 PRC but you last post left me wondering if 1 gr. increments maybe let ya miss a node.
Retumbo might need a heavier bullet too

Agreed, I would think that with that bullet I would want a slightly faster powder but maybe not!

 

[bsnyder]

I find a great load at 82.5 of n565 and the 199

 

[WYOHTF]

All the guys loading for the 30 Sherman Mag(300 PRC improved) seem to love R26 and VV570
I used to have a 300WM and it loved Retumbo and 200 gr Noslers, I used H1000 for the 165's

 

[Recon$$]

I find a great load at 82.5 of n565 and the 199

Any pressure signs. I didn't chrono anything today but I see other guys almost hitting 3100 fps at 76 gr. And hitting pressure before 80.

 

[Deleted member 109523]

Retumbo out shot 570 in mine with the lighter bullets like the 195 BL BDII's. I know it's a different bullet. But very close

H1000 pressured out before the other two. Mines also a 30 SM

 

[bsnyder]

Any pressure signs. I didn't chrono anything today but I see other guys almost hitting 3100 fps at 76 gr. And hitting pressure before 80.

No. This is in lapua brass. I'm at 3140 in the summer and 3101 to 3097 in 7 degree weather.