I just picked up a smith and wesson 1700ls in an odd ball caliber. 7x64. Cant seem to find any information on it.
It's a popular cartridge in continental Europe, and has recently attracted a growing following among UK deerstalkers. Although very similar to the 280 Rem, it's non-interchangeable. RWS loads ammunition and has unprimed brass available. Dies are no problem. Although it's often compared to the 280 Rem by Americans, and sometimes described as a 280 clone or 'inferior copy', it should be the other way around as the 7X64 preceded the 280 by exactly 40 years having been introduced by the German designer Wilhelm Brennecke in 1917. It was one of several big game and African cartridges from Brennecke in that period and like many of his cartridges was designed for high pressure loadings in strong rifles, in this case 60,191 psi (CIP). It was intended to outperform the existing smaller and lower pressure 7X57mm Mauser and was designed with the Mauser G1898 service rifle or sporting rifles built on the '98 action specifically in mind, initially as a possible military number.
There are data available in some US publications, Hornady's reloading manuals for instance. It's very easy to handload though if you can find brass - simply take 280 Rem data and reduce both starting and maximum loads by 5%.
The S&W rifles of that period were 'rebadged' HVA models (Husqvarna Vapenfabriks Aktiebolag) made in Husqvarna, Sweden. Early HVA / S&W rifles were an improved small-ring Swedish M1896 action with a military trigger and external Mauser claw extractor, but yours appears to be based on the later (and final) HVA Model 8000/9000 series. These were introduced according to Frank de Haas (Bolt Action Rifles. Krause Publications) in 1969 and HVA stopped firearms manufacture in 1972, so few found their way to the US under either name. (The firm is still around as a motorcycle manufacturer.) De Haas summed up this aspect of the model thus:
"I have no knowledge that Swiss & Wesson ever imported this model. I also have no information as to how many of these HVA rifles were made, but surely the number must be quite small."
You may have a rather rare animal there then.
According to De Haas, the 8000 and 9000 were mechanically identical, but the 8000 'Imperial Grade' had a better finish and higher grade walnut stock over the 9000 'Crown Grade'. You appear to have the better one from your photo.
Here's a very complimentary Youtube video about the HVA 8000. The stock may also be different from the HVA badged versions as S&W specified its own grade of stocking.