.260 Rem and 6.5cm Reloading

[SN13]

I have a stupid question.

Hornady has reloading data:

.260 Rem

https://www.hornady.com/assets/site/hornady/files/load-data/260-rem-147-153gr.pdf

6.5 CM

https://www.hornady.com/assets/site/hornady/files/load-data/6-5-creedmoor-147-153gr.pdf

Both have listings for the following powders:
.260 - RL-17 - 40.3 = 2600 FPS
6.5 - RL-17 - 40.1 = 2650 FPS

.260 - SUPERPERFORMANCE - 42.8 = 2600 FPS
6.5 - SUPERPERFORMANCE - 42.9 = 2650 FPS

.260 - IMR 4831- 41.6 = 2500 FPS
6.5 - IMR 4831- 42.2 = 2650 FPS

Now .260 has load data for the following:

.260 - RL 19 - 44.8 = 2650
.260 - RL 22 - 44.4 = 2650

But 6.5 has no data for either. . . . Even the faster 135gr Hornady has reload data for RL23 which is, the way I understand it, similar to RL22.... (https://www.hornady.com/assets/site/hornady/files/load-data/6-5-creedmoor-135gr-a-tip.pdf)

My understanding, and my gut, says that comparing RL17 and Superperformance data between .260 and 6.5 and extrapolating the data from .260 for RL19 and RL 22.....

That one could safely start at approx 40gr of RL19/22 and work up safely considering the cases have 1 grain of water capacity difference....

Anyway, Does anyone have reloading data for the 6.5 creedmoor using RL19 or RL22?

Thanks.

 

[Steel head]

I personally feel both cartridges use exactly the same powders but 260 can use approximately 1/2 grain more.
R19 and R22 are so so in 260.

260 has a lot of ancient Data where 6.5.cm obviously is pretty new.

R16 & R26
IMR4451
H4350
260 loaded long can manage H4831SC quite well.
These the great powders for both.

Hornandy obviously hates 260, just look at their Data for it.
It’s an insult!

 

[ScottDWallace]

43.0 of H4350 with Lapua 136's give me 2900. That Hornady data is anemic at best.

 

[SN13]

The main focus of my question is does anyone have RL22 load data, and / or does it seem logical that a 40gr load (given 44.4 gr max* .260) would be safe for a 6.5cm load.

 

[Steel head]

The main focus of my question is does anyone have RL22 load data, and / or does it seem logical that a 40gr load (given 44.4 gr max* .260) would be safe for a 6.5cm load.

I’d start with 41-41.5
Since it’s so much slower it should be no issue.

 

[308pirate]

If only we had a reloading forum...……..




Oh wait

 

[Steel head]

If only we had a reloading forum...……..




Oh wait

Or giant reloading data threads about 260 and 6,5cm............

 

[SN13]

@Steel head and @308pirate There's a reason I put this in the "Stupid Question" section.