tweeters keep blowing

Sounds like you may have the gain on the amp set too high for the tweets. How high is the gain set?

about the same as the 6.5 come to think about it i do have it turned up all the way now i am going to turn it down but can i still run 2 pairs of tweets off one pair of channels?

That amp is 2 ohm stable so yes you can wire 2 sets of tweeters in parallel to the amp. But I would suggest that you turn the gain down that is probably what is blowing the tweeters. You can have the best tweeters out there but if you are sending them a clipped distorted signal they will blow. Here is an explanation on how to set the gains but tweeters are a little more difficult to adjust since it is hard to hear the distortion sometimes. https://incolor.inebraska.com/weisinator/car-audio-basics/set_amp_gains.htm

their is two gains on my amp so i turn the gain down on the tweets but keep the gain at the same level on the 6.5 speakers. this wont effect the power of my amp right?

300 Hz is way too low for a tweeter.  This is a mid bass/midrange frequency.

Remember also that many tweeters list their power rating for the SYSTEM they are designed to operate in, not for the amount of amplifier power they will handle directly.  In a standard 2-way speaker setup (woofer and tweeter) approximately 75% of amplifier power goes to producing the low frequencies in the woofer, and only 25% to the tweeter.  So in tweeters, listed power ratings are often for amplifier program power, and assume you are using the proper crossover for the tweeter. 

The fastest way to toast a tweeter is to send it low frequencies at relatively high power, and the fastest way to toast a high-pass crossover is to send it too much power.  Passive crossovers are rated for the maximum voltage the capacitors can handle, and exceeding that by even a little in a cheaper xover can result in "max smoke."  An electronic crossover is a much better solution, but requires more time, money and care to set it up properly.

Tweeters should be crossed over between 2500 to 5000 Hz, depending on the driver's ratings, and generally the higher the better.  A passive crossover should be rated for 1.5 times the system power you intend to throw at it.  You need a mid-bass and/or midrange driver to handle the frequencies between your subs and the tweets.