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H&K 300 .22 Mag

After looking at this one for about a year at a local pawn shop, I finally put a deposit on it and should be taking it home soon. It's an H&K Model 300 in .22 WMR caliber with H&K mount and rings and Weaver K-4 scope. Overall excellent condition but with a few minor stock scuffs and handling dings. Do any of you own one? How well does it feed the magnum cartridge? I've heard that it's hard to make a .22 magnum feed reliably in an autoloader. Any information appreciated.
Comments
H&K isn't (or at least WASN'T) a fly-by-night outfit when this gun was introduced back in the 70s; wonder who has been whispering anti-magnum thoughts into your sleeping ear?
And, if you think the Remmy 597 is so much more gun; why is it only $200?
The HK 300, is an extremely robust piece of equipment, that carries forth the HK legendary traits...quality, accuracy, and extreme reliability. For $800.00, you got a steal on the deal, as the mounts and rings go for $300.00-400.00 alone, if they are the HK mounts.
Enjoy your new rifle!
Best
EDIT 1
Actually, HK, is not just a normal "NAME BRAND", such as Remington, Winchester, or Savage. They have sought innovation, quality, customer service, and reliability in every aspect. They don't revolve around the bean counter's, to some extint. The particular line of rifles in question were made in 22LR, 22 WMR, 223 Rem., 308 Win, 270 Win, and 30-06. They were and ARE the highest quality, most reliable, and one of the most accurate SPORTING(specifically designed for hunting, and sporting use), semi-automatic rifles, ever made.
The problem with the 22 WMR, and 17 HMR not being chambered in many semi-automatics, has NOTHING...I repeat, NOTHING to do with magazine feeding problems. The Ruger Rotary magazine, of which many were made around, not just the Ruger's, are extremely reliable. What the problem is, is being able to tame the pressure's before opening the bolt. Yes, those rounds operate at quite high pressure's for a rimfire. AMT's design used a series of chamber vents to bleed some pressure back around the case, while other's used stiffer springs, and heavier bolts to try to Raymond the opening of the bolt, until the pressure was at a safe level. With the 17 HMR, there is a problem with dirty bores, creating higher than normally high pressure's. Thus, causing the bolt to open with the pressure's still being dangerously high. Higher pressure's in dirty bores, are an inherant problem with ALL 17's, not the 17 HMR.
Then lastly, there's the old addage, that you get what you pay for. You definately are not going to get a new Caddy STS, for the price of a Ford Focus. Same goes for rifle's. There are several custom/semi-custom gun maker's out there, of which one of the most prominant in the USA is Cooper Arms. They will build a rifle off one of their base model's, with as much glitter as you want. I have seen some of their Model 57's, in 22 LR, that are not only a work of art on a sttel and wooden canvas, but also a shooting masterpiece. They start around $1500.00, and I have seen them as High as $5200.00. That HK 300, while not a Cooper, is a very rarely encountered beast. It falls into the category of price and demand, and even when they were still in production, were a bit pricey.
Best
There doesn't seem to be many .22 wmr or .17 hmr in semi auto and which apparently seemed to be attributed to feeding problems that I am aware of and is one of the reasons no doubt that companies are not producing many, not a fan of the .17 hmr myself and prefer the venerable .22 wmr. Personally I would come up with another quality firearm that is not so overly priced, my .02.
Regards