who makes the westernfield 12ga shotgun model m505a
Try a good gun shop. H&R makes a fine single shot 20 gauge.
Many different makes, models and designs. Start with Google.
Marlin makes a .308
No, and no other company makes one either. 10,12,16,20,28, and 410 are what is being mfg at this time.
Browning BLR is chambered in 30.06 and many other calibers.
A Winchester 12 gauge model 1200 pump shotgun holds 2 in the tube and 1 in the barrel. So it holds 2+1 which makes 3 total.
Gauge indicates a shotgun, not a rifle. The 8 gauge has been out of production for many years, and was a black powder shotshell. The 8 g. is not legal for hunting in the US.
There were several different MAKES of bolt action shotguns, and the magazines do not interchange. If you repost your question with the make and model, we can give you a much better answer. IF the shotgun is a Mossberg (one of the more common bolt actions) you can check the website for Havlin Sales.
This would be an early H&R shotgun from 1905-1940, or thereabouts. The 36" barrel makes it more interesting.
Mossberg made most of the Hawthorne bolt action shotguns. They were sold as a Montgomery Wards special.