Re: Which Weight Arrow Should I Go With? 8.4 or 9.3 per/inch
There's alot of factors that go into arrow performance. I refer you to the Ashby reports.
If the arrows are spined correctly in both sets, it won't make a big difference. If just the weight is munipulated, you'll have to step it up a bit more to see substantial gains. Total arrow weights around 650gn show sig. increases in penetration over lesser weights. If you're keeping the same points, vanes and nocks, then you're not changing the weight much; 27gn on a 30" arrow.
As far as elephants total arrow weights of 1200gn+ are the norm, and heavy single bevel, two blade broadheads.