Welcome to the forum!
You’re going to have a hard time spreading even a small game with 300 chips. I suppose it can be done, but it’s far less than ideal. And no way you can do .25/.50 and 1/2 with 300 chips.
25¢ x 60
$1 x 140
$5 x 100
Let $20 bills play, if necessary.
But you’re not also spreading 1/2 with that.
This below is kind of the go-to breakdown.
25¢ x 100
$1 x 200
$5 x 200
$25 X 80
$100 X 20
That is perfect for .25/.50, and should suffice for a reasonable 1/2. Total bank of $5000+.