broadhead for matrix 380 vs Alaska peninsula brown bear

I am planning a trip to the Alaskan peninsula in pursuit of a monster brown bear. I have an Excalibur Matrix 380 and I am using zombie slayer bolts but I am concerned that my 150 grain bolt cutter broad head might not be the right set up. Total grain weight is 470 with the 150 grain broad heads. Any of you guys have a suggestion for a broad head that will kill a monster bear and leave a great blood trail?

Good sharp cut on contact fixed blade 125gr or 150gr should do you just fine.

you think the Excalibur Bolt Cutters will work?

If it were me I would shoot something like these:

http://www.lancasterarchery.com/solid-legend-175-dangerous-game-broadheads.html

380 has plenty of KE and the extra 25 grains will help penetration and won't slow you down that much.

The only potential hangup is whether they will group okay out of your 380.

The solid broad heads have a reputation for being super tough and razor sharp.

The zombie slayers are a very good bolt and much tougher than the factory excalibur diablo's but even they have limits and will shatter if you hit heavy bone. I broke both shoulders on a 260lb whitetail using a zombie shaft with a mechanical last winter. The bolt shattered on the offside shoulder blade but did destroy the shoulder as well. The deer dropped on the spot. I am sure that if I had been using a fixed blade the shaft likely would have remained intact as the one of the blades on the mechanical broke in half and the other was bent.

The only carbon bolt I have ever shot that seemed indestructible were GT Pro IVs (They are now called Nitro Pro). On a 20 inch shaft they are about 95 grains heavier than the zombies. I have actually had them hit rocks (after a pass thru) without shattering.

Good luck on the hunt and looking forward to the report.

Thank you