I think you've got more than "enough gun". As mentioned by others above, shot distances from blinds are generally less than 100 yrds. Even a really big tom will actually only be 18"-20" wide through the shoulders and maybe 24" crouched on a limb feeding. Skin is relatively thin and again as mentioned, the bones are not heavy/thick. Your PH will most likely have the blind positioned so that a cat feeding on the bait will be as broadside as possible for several reasons: a) to give you the largest vital area presentation. b) so he can confirm "nuts" before you shoot. The penalties for mistakenly shooting a female are pretty sever and pretty much the same whatever county you're in. You'll still pay the full trophy fee and govt will keep it. PH may face fines or disciplinary actions.
Again as mentioned, Bullet choice is pretty important. Leopard are sensitive to high velocity impacts but, depending on bullet choice, that can also make BIG holes on the off-side exit. Maybe think about using a mono-metal like TSX or a TTSX. The TSX doesn't expand as quickly as the TTSX and is unlikely to blow a big exit hole even if you happen to hit a leg bone of a crouching/feeding cat. If you put pretty much any size hole thru the heart, even from a solid, he's not going to go far.
Be sure to spend time studying
Shot Placement. Take special note of how low in the chest the heart is and ESPECIALLY when crouched - lays on the floor of the chest wall. Also, you'll likely be shooting at a slight upward angle, maybe 15-20ft above your seated position in the blind.
Your rifle is very likely to be a bit pre-positioned very stable, "supported" at the forestock and buttstock and generally pre-aimed where the PH thinks the cat is most likely to settle on the bait. All you'll have to do is quietly sit forward, shoulder, safety off, final aim point adjustment and squeeze.
Once there is a cat on bait and the blind is built, it would be a good idea to measure the distance from the bait to the blind and take a couple of shots at the PH's range to make sure you're dead nuts zeroed. You want as little guesswork as possible. Just put the crosshairs on and squeeze.
Optics - your hunt is likely to be under very low light evening/morning or even full night. If full night, it's not unusual for the PH to have lights set up. Usually red and on a rheostat. Like most predators, leopards can't really "see" red light. They will notice a general "brightening" of the area but if the rheostat is turned up slowly, after the cat as settled on the bait feeding, it may take him awhile to notice. It will be just to the point the PH can confirm "nuts" and the after he's settled on the bait and feeding, he may not notice the change. An illuminated reticle scope can come in real handy. Leopold's Custom Shop used to offer a "green dot" in their VX-R line. That is absolutely ideal if you'll be in a red light situation.
