I just shot a huge doe yesterday with the .452 300 gr. XTP at 21 yds, went in below point of shoulder through top of heart and out behind offside leg.It destroyed the entrance shoulder went through the top of the heart with a 50 cent piece size hole and exited with same size hole, insides were a mess, she made it 60 yds stumbling and falling the whole way... This was w/85 gr. of pyro rs.. Ive killed at least 40 whitetails with the 240 gr xtp`s and none made it over 60 yds, most dead in 30-40yds, killed 1 with the 300 gr. xtp, 2 with the 348 gr. powerbelts, both had softball size entrance wounds and fragments buried in offside ribs where powerbelts exploded, 100 grs pyro pellets both shots around 45 yds(both deer dead but poor performance as far as Im concerned)..know a bunch of guys that had the same thing happen using 100 grs and up, powerbelts need about 85 grs of powder to work right... have a friend who insists on using 150 gr. of 777 w/295 gr. powerbelts and wont believe the bullets are blowing up, hes lost 4-5 deer in the last few years.I wouldnt take 10 powerbelts for 1 xtp..jmho