I'm an Old Fart (65) and I'm not a hunter ('issues' with the polio virus) BUT......
if I were to add up the DATES that the ammo for my rifles was introduced and then divide by the number of firearms, likely the result would be about 1899 or 1900 at latest.
Yes, I use a lot of the old ones and they are all fun.
If you want to see a lot MORE old rifles out there in deer season, try persuading one of the ammo companies to turn out a batch of .43 Mauser. There are still lots of these fine/fun old rifles out there and they are very good indeed for short-range. Removing the cartridge from the list of those being made was a POLITICAL decision: at the time of its demise it was the cheapest big-bore cartridge available in Canada ($3.65 a box vs $5.25 for a box of .303 or a 26 of Five Star).... and sales were going UP because all the US shooters were starting to buy it from Canada, Remington and Winchester already having delisted it.
There is still LOTS of room for the old-timers and I am very happy to see so many younger guys who don't simply 'diss' a cartridge because it is more than 3 years old.
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BTW, 308W makes into .300 Savage quite easily. Two-fifty Savage is the .300 necked down.... and the .22-250 is just the .250 necked down, so necking it back UP is certainly permitted!
Do have fun!