I also have experimented with Ross bolts to get them into the rifle and cycling.
With an UNpinned 1910, it is easy to do this: very easy. That's the bad part. The GOOD part is that the correction also is easy and takes only a couple of minutes. It also is POSITIVE: something would have to be BADLY broken inside the bolt-sleeve in order for things to get out of whack by themselves. I have never seen a bolt-sleeve this bad and I have seen a few bad ones.
With a PINNED 1910, it is flat-out impossible to mis-assemble the critter. It is very difficult to get the thing together at all but, once it is together, it is solid.
The 1905 is a different matter. Of my several 1905s, I have been able to assemble the bolt incorrectly on ONE. When put into the rifle, it would not reciprocate and I had the Devil's own time getting it back OUT. And that was with a BADLY-worn bolt and action which had had almost ZERO maintenance and a lot of hard use for many, many years. Generally, with this model, a great deal of playing around MIGHT get the bolt assembled wrong but then it won't go into the action at all.
Yes, I HAVE found unpinned 1910s in shops, assembled incorrectly. If I can afford them, I buy them just to get them out of the shop. SOME shop-owners just do not want ANYBODY dicking with their stock...... and they don't know enough themselves. It's easiest just to buy the damned thing. At least you know where it is afterwards and you know that it's not hurting anyone. Hmmm..... come to think of it, I have got a couple of VERY decent shooters like this.
Hah! I was in a gun shop in Brandon one day, years and years ago. Old fellow in there, a customer, was talking guns and I joined in. We talked about some of the older ones and I asked if he had any experience with Rosses. He then told me that you have to be very quick with Rosses because of the self-ejecting action: the rifle ejects the fired round AND the bolt when you pull the trigger. I assured him that they were not supposed to work like that, had an awful time convincing him that they were not supposed to do that. I only found out several years later that I had been talking with Fred Jensen..... and there was NOBODY who knew more about guns than Fred! He is much more famed as the gunsmith that hardly anybody could get a rifle out of, famed still (he is long gone at the young age of a mere 96) for his super-accurate rifles, his rages and his utterly incredible long-range shooting.......... but his sense of humour was seen by very few people.
In my one-and-only meeting (a life ambition) with Ellwood Epps, years after his retirement, I made the TERRIBLE mistake of asking about problems with the Ross Rifle. Ellwood exploded into a screaming rage, yelling at the top of his lungs, "It's a lie! It's a Gxx-dxmned lie! There was NOTHING wrong with the Gxx-dxmned Ross Rifle! I've built HUNDREDS of them!" Once Ellwood learned that we were on the same side, he told me that he would make me a .280 if I sent him an action. I never had the money, so this incredible offer lapsed when Ellwood passed on. I still don't have a .280. Just have to save up a lot more money.......
I also interviewed two men who were with A Company, 8th Battalion, during the St. Julien gas attack in April of 1915. They were part of the Reserve Company and went up through the gas when the French line collapsed. In the ensuing rifle engagement, it was a single Company trying to hold back an entire German Division. They very nearly succeeded. Their fight that day was one of the critical points of the Great War and made the War last another 3 years. Both men told me that they had had NO trouble with their Ross Rifles. They both admitted changing rifles during the battle, but only because the rifle they ere using got too hot to touch to try to reload. Their own rifles were allowed to cool while they heated-up pickup rifles from casualties. The used all their own ammunition, every round they could scavenge from the dead and wounded, and very round that could be brought up. I asked what ranges they were shooting at and the NCO just shook his head, looked down and said quietly, "Too close to miss...." The important point is that they had NO trouble with the Ross Rifles in this fight, which likely tried the rifle harder than anything else it ever endured. Thank you, L/Cpl Robert A. Courtice, thank you, Pte. Alex McBain. RIP, heroes.
Hope this helps.
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