Thread: 7PRC load data

What powder range are you using with the RL26

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Hornady brass fed215 67gr rl26 3.338 coal is 2990 in my rifle.

Originally Posted by 6.5 CRD

My barrel is 22", barely shot factory through it i started reloading straight away but from memory the factory 175 eldx i did shoot was around 2940. I havent got 2225 shooting good groups yet but speed is right on 2950. I havent persisted further with 2225 as ive decided not to just keep wasting consumables when i have a RL26 load sorted that shoots great groups at a hair under 3000.

Thank you for that. I’ll start load development once to get my rifle back hopefully this weekend. I’ll post up results from factory’s and reloads

Just catching up on some reading here.

I’ve just done my first ladder tests with H4831sc using Hornady brass and fed 215 primers , ELD-M
The accuracy was pretty good but a fair bit slower than I would have liked. Book max was 64 gr and I was finding pressure signs at about 62.5gr-63gr and only hit 2830 fps max out of a 20” barrel.

I was hopin for a little more room to move with that one but have just got a lb of retumbo (2225) to try out. Will see if I can get a little less pressure with a little more speed.

I have a box of adg brass sitting there but I kind of want to make all my mistakes and tinker on the hornady brass because I start on the adg. Is that a dumb idea? Should I just start with the retumbo In The adg brass

Start with the Adg mate do a ladder 66-69gns would be my guess but you should be able to find some real data on the combo the Adg will behave different to the Hornady so better to start with the Adg I’d expect 2850-2950 mate was shooting 2217 22” 2930fps

second that, the results were night and day between Hornady and ADG you might. 100% start with ADG. I had better results with LR primer with H4831sc,

Thanks Kelton and Tibo. That’s really helpful.

Interesting about the LR primers with H4831sc. Did it help in giving more speed with the same charge weight or just less pressure signs so could increase your charge weight more?

And kelton , would you ladder test in half grain increments to start with from 66-69gr ? And then do a .3gr ladder once you’ve found when the pressure starts? Or just do one really big ladder test in .3gr increments all the way from 66-69?

LRP helped getting better es and sd. As for brass, Hornady brass was really inconsistent, I was getting loose primer pocket after one firing with some, others all good, it made it really hard reading pressure sign.

Originally Posted by Bowhunta

Thanks Kelton and Tibo. That’s really helpful.

Interesting about the LR primers with H4831sc. Did it help in giving more speed with the same charge weight or just less pressure signs so could increase your charge weight more?

And kelton , would you ladder test in half grain increments to start with from 66-69gr ? And then do a .3gr ladder once you’ve found when the pressure starts? Or just do one really big ladder test in .3gr increments all the way from 66-69?

Just do .5s mate you won’t run into any major issues if you get above pressure it’ll only be a small difference my rule of thumb is large rifle up to 70gns and magnum over 70 gns

That’s not bad for 180 class projectiles from 20 inches of barrel. I got 2850 with 2225 and then hit pressure. Re26 would get close to 2900

Yip 62gns

Ladder test with the retumbo went great . Some good speeds (2942 was the fastest )and hit pressure signs bang on 69gr(justejector mark, primer was still ok looking and not stiff bolt.. Few possible nodes to explore there . Way way happier with this powder .
The ADG brass was a great call. Very consistent between all the loads and results.

Kenton (and anyone else) if I found a load that was good but wanted to try the large rifle primers instead of the magnum primers to see if I could reduce the standard deviation . Would I need to alter the powder charge at all being a smaller primer ? Or is it safe to just switch between the two on a load .

Safe to switch mate, the other way you need to be a bit carefull if you close to max

Safe to switch down looks like some good nodes their I found 180 eldm super accurate around 2850-2950

Also white river primers seem to fall between 210 and 215 cheap and available if availability is on the mind