Shaft Dia.

[Cane Knife]

In the exact same shaft poundage range (40-45 POC) would you go with either the 5/16 or 11/32 dia. shaft?

[Grey Taylor]

Do you want a lighter arrow for flatter trajectory or do you want a heavier arrow for better penetration on game?
Answer that and I think you'll have your answer.

Guy

[JRY309]

Finding POC in a 40-45# in a 5/16" can be difficult,there are some out there.Getting that spine in 11/32" would be easier.You may want to look at Stika spruce also.

[Gator1]

Check with Paul Jalon at elite arrows, he can set you up.

He is a sponsor here..... Fantastic guy and very knowledgeable.

[Orion]

There's enough variability in physical weight of POC that you could get the same physical weight in 5/16 or 11/32 shafts.  For example, the heaviest 5/16 shafts would likely be comparable in weight to light or moderate weight 11/32s. Of course, the heaviest 11/32s will be heavier than the heaviest 5/16s.  

The narrower 5/16 shaft, because it rides closer to the center of the bow, also means that it might need to be spined a little heavier, say 5#.  The additional 5# in spine might enable you to pick up a few more grains in physical weight as well.

The skinnier 5/16 shaft will penetrate better (ALL OTHER THINGS BEING EQUAL).  Skinny shaft diameter is one of the reasons for carbon's superior penetration.

In truth, though, the differences in the two options your considering are quite small.  Doesn't really make much difference on deer size critters.

[Cane Knife]

Thanks guys!