There is a woman in our archery club who gets passthroughs with 40# and 24" draw. There's no magic to this/ Get the best arow flight, a small broadhead, and keep your shots within an effective range. Deer are not big critters. It doesn't hurt to stay away from bones either, if you know what I mean.

As far as looking at bows? Generally speaking the fastest bows at 50# shooting a 250gr arrow arrow are going to be the same ones with the higher IBO ratings. Again, not rocket science. So this would be where I'd start my search. In comparing bows when you shoot them be sure and actually measure the draw length of each to make sure they are what they say. It does little good to chrono one bow at a 28" draw and the next at 29". And don't rely on limb tags as a lot of bows do not draw what the tag says. Measure the draw length. Keep your comparisons "apples to apples".

330 fps at 50# with a 250gr arrow? Highly unlikely. Here again, it's going to rely somewhat on the draw length. 28" is going to be approx. 20 fps slower than 30". Nothing---absolutely nothing on the string and really supertuned and it's still unlikely, and that meaning you're starting out with a bow rated for at least 330 fps or more.

The best I've been able to achieve in recent years was with a 2004 Martin SlayR w/ Nitrous cams (325 fps IBO rating). Set at 53#, 27" draw, shooting a 267gr arrow I could get 299 fps out of that critter. Increase the draw to 27.5" and it did 304 fps, but it fit me better at 27". Speed is nice, but it's just a number and if it's a normal hunting setup it really doesn't matter much whether the bow is shooting 260 fps or 300 fps. Within 30 yards there just isn't that much difference in trajectory.

If it's for 3D then that's different. Keep one thing in mind. With the lower poundage and high letoff of today's bows you might have trouble with the holding weight. Sometimes you can't establish enough back tension and physically have to hold the bow up. Many people don't realize it but they would shoot better with less letoff. So maybe try adjusting one for 65%. It makes for a smoother rollover also and less precipitous drop-off.