I tried RL-26 in my Roberts, burned dirty, left granules of unburned powder in the chamber, couldn't chamber the next round. Shook'em out, chambered easily.
DF
If you want to try again switch to a magnum primer and use a full bore load and a heavy bullet. Many slow powders are like burning charcoal until you hit the pressure level they were designed for. I have seen this with H870 consistently. A tight neck can help sometimes too. I am not seeing too much crud with R26 and the similar 6mm AI. Bore looks a little dirty but it knocks out with one patch. Some are theorizing the anti coppering agency is what your seeing and is not carbon build up. YMMV
Unburned powder in the chamber can be a sign you are not generating enough pressure for the case to seal itself. Put the hammer down on those loads and they may come around.
Thanks for that info.
I've had such good results with H-100V in the Roberts with 100 gr. TTSX, I'm probably staying there with that round.
I'm going to work up 7RM loads with RL-26 and 160 gr. NAB's for my bud's Africa PG hunt in Aug.
Already got a CDS dial for his VX III 4.5-14x50 LR scope. He loves that scope and it's a proven performer. The gun is a SS Sendero.
I asked him why he packs such a heavy rifle. His response, "I know what it'll do when I get it there". And his track record with a .270 Sendero on WT's and hogs is pretty impressive.
DF
