I read an article translated from a Swedish hunting survey conducted by Sweden's version of a national wildlife agency on moose hunting - I don't know the comparison other than general body mass/weight (I have not hunted either.) - but the point was that something like 2/3rds of all moose were harvested with the 6.5x55. The general bread & butter bullet being a European 156 grain (10 grams). As to the stability of the Hornady 160RN - I shoot 'em in a sporterized 1900 Mod 96 with the original barrel turned down to Win-type featherweight contour and cut down to 22". As best as can be determined, the twist is slightly quicker 1 - 8" probably between 7.8" &7.9". It will NOT tolerate anything lighter than 140 gr and the heavier stuff is always more accurate than the lighter. My most accurate load is 46.3 gr H4831 with a Hornady #2640 160RN seated out to an OAL of 3.157 which still is over 30 thousandths off the lands. (see pic below.) This recipe typically clocks on my magneto at 2410fps at sea level and out of a cold barrel, the first two shots are generally touching at 100yds - given the pencil thin barrel, after that the third shot flies out an inch or more and a fourth will double that - so it's a two-shot wonder and other than a sentimental shot or hunt here and there, it stays indoors. But I digress, so to the bullets:
The Hornaday #2460 RN is a tad over 1.25" (I miked a random bullet at 1.2565) with a BC (G1) of .323 and BTW, on the terminal end it performs well - on a typical southern whitetail when I'm able to find a bullet the rear half portion is always intact with the front always mushrooming to .45" or more and staying together even after going through a shoulder. Of course given the hunting ranges down here, my impact velocities are always down around 2100-2300fps.
In comparison the Woodleigh "Weldcore PP SN" #W80A has a BC of .509 with a recommended impact velocity range of 1900 to 3000fps and a random selection from the box was 1.3665".
Doing some coarse, estimated measurements, I would say the bearing surface on the Hornady is app 0.790" and an about 0.770" on the Woodleigh. And to answer that question, No I have not gotten around to loading the Woodleigh yet.
The poor picture is the best I could do with the phone but it should give you some idea of proportion with the two bullets. I definitely would suggest obtaining some of the less expensive Hornady 160's for 100 yard feasibility with your particular rifle and if promising, then progress to the more expensive Woodleigh. (I have heard threatning rumors over the last five years that Hornady is going to drop the 160, so I’ve stocked up with a couple hundred extra to last (I’m 66 LOL). Hope this helps with your heavy load research.