Home Forums Reloading Big Game Rifles Interesting published Alliant RL26 data

I was checking to see if RL26 might be a better route than the RL17 that I'm currently using with 100gr bullets (25-06 data) and it turns out that performance is expected to be much the same, something in the mid 3,300fps range. But I thought RL26 might show some gain with the heavier bullets, so I looked at the 120gr data and saw this:



Those charges for RL26 seem awfully low in comparison to RL17. Only 1.2gr difference. Other chamberings that are well-suited to both 17 and 26 show a larger difference between acceptable charge weights with 17 versus 26 when heavier bullets are utilized.





Not saying that Alliant doesn't know what they're talking about here, but if the 25-06 numbers are right, what might be the mechanics of why there's so little difference in acceptable max charges in this RL17 vs RL26 combo, as compared to the much larger differences between those powders in the 243 and 270? I know the 25-06 is a little more overbore. Just thought the numbers were a little odd and that I was maybe missing something.

I bet it's a typo....

If so, the RL23 numbers might be off on the 120gr data as well. Both are new, so maybe somebody was looking at the wrong spreadsheet.....

Perhaps you should ask Alliant. Their telephone-answerers won't know spit, I suspect, but _maybe_ they'll get the message to someone who'll check for typographical errors?

Internal ballistics have been puzzling man ever since the first caveman got explosive diarrhea from eating spoiled brontosaurus.

Ed

I thought we all agreed not to talk about that weekend, ever every again!

This is my results trying Reloader 26 with Nosler 115 grain Ballistic Tips. Velocity from my MagnetoSpeed was 3308, 3316 and 3309 for an average of 3311 fps.

Alliant says the data is legit and has been shot using piezoelectric transducers. Interesting that the 25-06 with 120's only calls for 1.6 grains more RL26 than the 243 with 100's.

There's definitely something wrong with that R26/120 data.