I have two pioneer ts-w302r 12" subs will my 300 watt amp push them?

Your amp will push the pair, but will likely overload if you try to crank it up too much, those subs have an 800 watt peak, that's per sub so your looking at 1600 watt total. But with a 50 watt rms requirement per sub your 300 watt amp will power them but won't give you peak performance.

Hope this helps

Yup thanks