Gundog,
I miswrote stating the one lung shot is not a killing shot, just that it is not an efficient or fast-killing injury which usually means longer and more difficult trailing jobs.
Actually, the survival rate of single-lung shot deer is very low, but it is one of the biggest reasons why many deer are not recovered.
The problem being is with still one healthy lung, they can go alot farther and leave less sign than a double lung hit, which is always fatal (usually within a reasonable distance) with a good blood trail to follow.
Many times, thinking they have a double lung hit, hunters begin trailing too soon and jump the deer (which will usually bed down quickly) increasing the chance of losing it. If you KNOW or even suspect you have hit only one lung, wait at least a couple of hours before trailing it, and still anticipate the deer still possibly being alive when you find it.
Bad angles, deflections, the animal spinning away from the arrow and yes...even b-b-bad shots all can result in single lung hits, and when they occur it doesn't matter WHAT type of broadhead you're using.
I'm glad to hear you've never made a bad shot though.....there's damn few of us left!! lol!
"Class Dismissed"(Sorry if I rambled..)
Have Fun, Hunt Safe,
>>--Ron--<>