ORIGINAL: Arthur P
Matt, my trajectorycalculator isn't dead nuts accurate - doesn't allow for drag/velocity decay - but it's good enough for a ball park figure. With a 40 yard zero and shooting at 45 yards, the 284 fps arrow will hit about 4.2" low. The 306 fps arrow will hit about 3.5" low. So, your 22 fps gained you approx .7"
Now, if you could bump the speed up to 406 fps [:-]the arrow would only hit 1.7" low at 45 yards.
Thanks Aurthur, that's my point exactly, even with a 5 yard mistaken quesstimation (is that a word) there isn't a shooter alive that can hold his pin to eliminate human error to .7" on a 45 yard target.....out of a shooting machine, yes...human shooters, no.
One tip I'm trying to make with this post is that you should be shooting a comfortable poundage and adequate arrow out of your bow making you a better more accurate shooter rather than pulling poundage you might be strugglin with or an arrow underspined for your bow trying to get the magic speed or a few fps more that really means nothing other than perhaps KE....but you first have to be accurate and hit what your aiming for rather than hope you make up for errors with speed....what good is a fast bow if you struggle with it or can't hit what your aiming for because your shaking on an over poundaged bow. Or, your arrow is too light for penetration because it absorbs too much of the impact....heavier is always better.
PAB, (Frank), great point from archer to archer on pin assembly....I've seen this myself as well as the distance the sight is away from the riser....longer sights tend to be gapped differently from shorter sights.