LPR 300 Norma load data

[Rhovee]

I think N565 is also up there in flame temp. But not as bad as N570. Usually the N570 loads are bad because they get you to the next node. So higher pressure and flame temp do it. It's not nearly as bad in big 338's. I still shoot it in 338 Lapua Improved.

 

[Longtine88]

Does 565 cause the same issues as 570? I never hear it mentioned, only 570 concerning heat and erosion. 568?

Not near what n570 does. It acts a lot like h1000 with just slight more erosion. I use n565 in lots of calibers. Especially 30 cals and 7 saum

Temps:
N570 @ 3,950
N565 @ 3,810
H1000 @ 3,800

 

[Phil Rizzo]

My 7ss likes 565 also.
300 win is being fed 568, at 80grs it's giving me 2950's with 200gr AB's

 

[KH_Outdoors]

I just can't get good speeds before hitting pressure with 568 with any of the heavy for loads like 28N, 300NM, or 300NMI.

Thats good to know on the N568. I'm hoping to try that in my 300 NMI because 570 is rough on stuff.

@Phil Rizzo To my understanding N570 is so harsh on throats because firstly kernel size, secondly heat. Imagine a sand blaster spraying gravel vs sand as a reference. That's how it was explained to me.

Also, how I understand it the N565 is not as hard on barrels as N570 because of kernel size & heat. However all the above are still harder on barrels than H1000 because of VihtaVouri's higher energy mixtures.

 

[KH_Outdoors]

@Rhovee did you run your 300 Norma 215/H1000 up to pressure by chance? Just curious if you ever found the top end, getting ready to start break in & load dev on one of these. Thanks!

 

[Rhovee]

3070 was about pressure. 86 grains and some change.