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+--- Thread: New vids and JRB (/showthread.php?tid=137)
New vids and JRB - Lemonaid - 11-25-2020
Here is a vid with data for Benchmark and light bullets: https://www.youtube.com/watch?v=t8Sl6flD4-Y
JRB had excellent results with Sierra 90GC and Lever: https://www.youtube.com/watch?v=UKHhUt_iZpY
RE: New vids and JRB - grayfox - 12-20-2020
I did some workup with 90 Tgk's at the range.
Using Varget, seated to 2.260 off of the Vmax 87gr data as guide. Similar to JRB.
29.1 gr, 2807, sd-14
29.3, gr, 2831, sd-7
29.5 gr, 2851, sd-5.4
29.7 gr, 2871, sd-3.4
29.9 gr, 2886, sd 19.
So I'll do some more in the 29.3-29.7 range, maybe try some seating depth delta's...
But anywhere in that mid 2800 range would be great for a hunting load.
ps, I don't try to "find" a good load simply with 0.5 gr increments, I might use that to establish the working range of this lb of powder and this barrel, but load increments > 1% charge wt have the likelihood of missing/skipping right over a node, at least in my estimations. So once I have an idea where the node might be I look at 0.8-0.5% wt increments to identify it... however a 0.1 gr delta isn't usually statistically significant so 0.2 gr is usually my lower limit.
RE: New vids and JRB - grayfox - 12-29-2020
I did a set of 29.3, 29.5, and 29.7 today at the range (varget for the 90 Tgk)... and well, wasn't real satisfied with the grouping results. Could have been my eyes weren't focusing as good as they could or could have been the loads, who knows....
The 29.5 and 29.7 all loaded pretty much maxed out, seated to 2.260... maybe I will dial it back and look for a lower mode 28.8-29.2 grs. There ought to be one around 2780-2810 based on results from some other of my rifles in the 20-22" barrel length. Don't know, don't know. Or might have to fall back onto using Lever...
RE: New vids and JRB - grayfox - 01-03-2021
Did some more testing, at 28.8, 29.0, 29.2 of Varget for the 90 Tgk, the 28.8 looks like the load I'll go with for now. It has plenty of punch out to 250 which is farther than I plan to shoot for hunting, at 2787 ft/s. Coincidentally thats close to the JRB load at 2792 -- I think he went for a faster one but this one will do for me, for now. Will still do some confirming. This brings me now to at least 3 good bullets/loads, 103 Eldx and 95 Nosler BT with Lever, and the 90 Tgk with Varget.