1905 Ross Questions

ssapach

ssapach

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I don't suppose there is a sort of manual out there that goes through all the bits and pieces of a 1905 Ross rifle? Something like bolt disassembly and reassembly? Or would that be pretty similar to a 1910 bolt?

More specifically at this moment in time, I'm curious if anyone knows the size and pitch of threads used for the assembly hardware. I had one of my rifles apart and wanted to chase a few holes, but I couldn't get any thread gauges to match up with any of the screws. I tried both metric and imperial as that's all I have for thread gauges. Would they be some other wacky thread or am I just losing it and the threads just aren't as perfect as modern hardware would be?

I definitely don't want to drive a tap into a hole and totally bugger the threads....
 
I don't know for sure but they may be British Association threads. They have some different pitches and a 47 degree thread angle as opposed to the 60 degree found in the unified and metric thread forms. BA threads were commonly used on British guns up until recent years. I think the Parker Hale scope mounts came with BA screws, hard to find taps on this side of the pond.
 
ALL threads on any Ross Rifle are US Standard threads.

They are a 60-degree thread, sharp tops and bottoms. Any machine-shop in the country can make them.

That said, Gunmakers for centuries have used EXTRA-fine threads for most applications. Instead of a thread being the "normal" 40, for example, they use 48 TPI. This throws many people, making them think that some weird Metric or Babylonian thread was used. Not so: same old American threads on Rosses, just very darned fine.

To determine exactly what's what, you will need a decent Vernier caliper (or possibly digital caliper with a fresh battery) and a Thread Pitch Gauge.

For a Manual, pop over to milsurps dot com, take out a membership and download (free!) their several MANUALS on the Ross. They have manuals for the 1905 and the Mark III models both.

The 1905 is broadly SIMILAR to the later Mark III but it is NOT identical. You NEED the Manual, ESPECIALLY if yours is a very early model.

Go get it: the price is certainly right!
 
Thanks for the input folks!

My particular thread issue was with the 1 large screw that holds the back end of the receiver to the stock/trigger guard. Seems like it would be 1/4" by some TPI, and while 28 TPI seemed closest, it wasn't a good enough fit to make me believe it was right. I may have to check again, perhaps get the opinion of the machine tool supply place I go to.

I will for sure check into the milsurps site when I get home from work tonight!
 
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