The Ross has got a bad rep because they are no good when they are hot. Ten years ago, another fella and myself entered the CFB Shilo summertime "2-Man Iron Sight" match.
Targets were said to be out to 400 yards, but Shilo ALWAYS changes something at the last minute, just so nobody can practise up: keeps everybody on an even keel, makes for a really terrific shoot each and every time. When we got there, targets were from 85 YARDS out to 550 METRES, with the 550-,etre target hiding behind a bush and half-concealed.
We were shooting a pair of 1910 Rosses, one my Chilean Navy rifle (DA-426) and the other a Bubba'd 1910 long rifle with the original 30-inch barrel uncut. We were shooting against AKs, RPKs, Minimis, C7s, M-1 rifles, 98 Mausers, LEs (of course)..... but we were the ONLY team shooting TWO bolt rifles. Out of 23 teams, we came in in 10th place.
We had zero failures to feed, zero failures to extract, zero failures to eject. Not only that but neither rifle blew up, neither bolt blew back. We went through a total of 76 rounds of ammunition in 8 minutes and both rifles were HOT when they came off the line. We had no problems.
The only failures due to heat that I heard of with Rosses were not really failures, but, rather, precautions against burning the hands of the shooters. At St. Julien, during the Second Ypres battles, A Coy of 8th Battalion went up through the gas and p;lugged the Line. I knew two men who were there, Pte. Alex McBain and L/Cpl Robert Courtice. Both me told me that they changed rifles during the rifle-battle phase of the engagement, as both their rifles had got so hot from being shot, that they could not longer be loaded without inflicting serious burns on the hands of the shooters. Both men picked up a Ross from a casualty and fired it until it was too hot to hold, then picked up their original rifles and kept shooting. They had NO problems. Pte. McBain, who was 83 and still suffering from gas when I knew him, got plain darned IRATE and started shouting when I asked if they had had any problems with their rifles. One might say that he was rather emphatic.
I don't think there are any issues with Ross Rifles and heat, and any such are legends, likely originally started by Conservatives who hated Sam Hughes.