guns&ammo

Question
can you use reloaded ammo with polymer handguns like GLOKS,SPRINGFIELD XD,S&W M&P,TAURUS 24/7 OSS,etc.for target shooting practices?

Answer
Whether the gun is polymer-framed or not has no bearing on whether you can use remanufactured ammunition. You should be aware that certain guns such as Glocks, SIGs, H&Ks use a polygonally rifled barrel. While there are many benefits to this engineering, you absolutely cannot shoot lead out of them. Pressures will build quickly and you will have a catastrophic failure at some point.

The other guns you've mentioned all have the older lands-and-grooves rifling, and lead should be OK for them.

With Glocks you should also be aware that the chambers are spec'd to the large end of the SAAMI regs, and chambers are unsupported near the feed ramp. This was done to ensure feed reliability, but because of it, I would keep my handloads to the tame side.

The last thing you should be aware of is that the manuals of most (if not all) of these guns explicitly say that you will void your warranty if you use hand loads, so you do so at your own risk.

If you are an experienced and competent handloader, I would not be deterred by this. If, say, Federal makes a bad lot of ammo that damages your gun, Federal is responsible for any damage that occurs. What the companies are saying is that if handloads are used, their assumption is going to be that damage that results was caused by defects in the ammo (e.g. over-pressure due to bullet set-back, which would be very hard to prove either way after the fact).

So briefly, there is no more restriction for polymer framed handguns than there is for steel, aluminum or titanium framed guns. Lead should not be used in polygonally rifled guns, and quality and standards of remanufacture (as with factory fresh) must be excellent. If these are followed, you  should be fine.