depending on what you want to know the Remington model740 is the previous model b4 the Remington 742 they were chambered in many calibers for deer hunting and had a 5 rd clip
Brownells Montezuma, Iowa
.222 Remington model
i have a 6404.2 colyer clip for Remington slide action and semi-auto in 0.308, 0.244 or 6mm and 300 savage cailbers. new in box. email me chicchitownATyahooDOTcom.
The Remington Model 760 was not chambered in .284 Winchester, so I am unsure what caliber you are referring to. sales@countrygunsmith.net
Find a good metal shop and provide them them the dimensions.
Try the auction sites
Remington didn't make a model 55 rifle, nylon or otherwise. Autoloader, lever, or Bolt, Clip or Tub, letters on left side of barrel?
No there is no Clip.
Yes, I am using a 308 and a 243 clip in my 1954 760 in 35 Remington.
It may be just dirty or it may be dented. Inspect it and clean it.
Try gunpartscorp.com, Jack First, or Triple K magazines