modern West side Black tail hunters, What rifle and caliber do you use?

[1961Wahunter]

.243 RUGER ULTRA LITE 20" BARREL HANDLOADED 100 SP HORNADY HAS BEEN THE SURGICAL TOOL  RESPONSIBLE FOR REDUCING THE BLACK TAIL HERD MORE THAN ANY OF THE MY OTHER RIFLES - OTHERS THAT HAVE PERFORMED FLAWLESSLY .280 AI - .270  - .300 WIN MAG - .260  - MARLIN 12 GAUGE SLUG MASTER LOADED WITH SABOT SLUGS  - .280 - 7MM MAG - RIFLED BARREL 20 GAUGE LOADED W/SABOT SLUGS - .7MM08 .25.06 - .30.06
ALL LISTED WEAPONS HAVE NOTCHED BLACK TAIL TAGS . ALL BUT THE SHOT GUNS HAVE BEEN HANDLOADED

[fish vacuum]

I've hunted blacktails for 25 years now with two different .270's. I inherited a .243 a few years ago and take it out now and then too.
I've killed around 20 blacktails and I think 3 of them were over 100 yards. The rest have been between 10 and 60.