Grizzly sells the Kodiak 1 3/16" 235 grain glue on head in single bevel.
Not a 300 grainer, but probably a viable option. They are a terrific big game broadhead.......if you can find 'em........Blowed if I can though
In the past I've paired them with 100 grain woody-weights on heavy wooden arrows (almost 1100 grains all up, from my 75lb longbow) and used them on Water Buffalo, with excellent results too.
Each of my Buffalo only ever required a single one through both lungs and across the top of the heart, and each one was down in 15 to 20 seconds. Each time the broadhead was either hanging out the off-side, or driven into the lower part of the off-side shoulder blade.
I reckon they're a great broadhead for big heavy game. Actually they would still be my go-to broadhead should the opportunity to hunt those big buggers ever come my way again
Sorry Clint, that was a bit long winded, but if you can find them, I reckon the 235 grain Grizzly's and woody-weights could be a very good option....
Best
Lex