Will this amp push both my subs?

Yes, it will power boths bus well.

300w rms though??
12" Type r's have been 500-600w rms for several years.
Are you sure you're not talking about type S's?

Regardless - It would probably work best with dual 2's.
Wired for 2 ohms (http://images.the12volt.com/12voltimages/2_2ohm_dvc_2ohm.gif) the amp would be capable of around 800w giving each sub 400. With the gain set conservatively it would be a good match.

If your subs are dual 4's your best option would be to wire for 1 ohm. However, the potential power to each sub would be 500w rms so you'd REALLY want to be careful with any gain setting higher than min if you want to keep the subs safe.

not a great journey right here. The subs want 1400 watts RMS at the same time, and the amp in basic terms supplies 1200 watts height (six hundred watts RMS, that's 3 hundred watts consistent with sub). Given under 0.5 the pronounced means, the subs won't carry out on your delight. If given means to the area of clipping, the subs will fail.