As others have said that is a nice old Caspian and you got it for a great price. I like the Caspian frames a lot and have a couple myself. The weak point was a consistent off the shelf source for mags, and now that MBX is making tanfo/Caspian mags that is a non-issue.
Personally, as already mentioned, I'd put a C-more on there and ditch the pro-point (I still have a Ross Deane modified pdp3 on my workbench as a paper weight). The screw spacing looks odd in the picture and it is hard to tell if it is the new standard spacing or not. If it isn't you could get a blank mount from a place like Cheely Custom and drill it to match your gun's spacing. If it is standard spacing, then your choices are wide open. (and yeah, I had a Redbuff on a Caspian frame, good tasco mount back in the day but not good for a c-more!). Also, I'd get either the EGW mag well or if you can find a Dawson Ice magwell those work well, also. You can pin the EGW magwell in place on the Caspian frame by using a long STI mainspring housing pin for a STI magwell and notching the EGW magwell. This will keep the EGW magwell from walking on you. The Trik Trigger from Caspian is also a nice addition, it is a flat trigger and feels great on these guns. Lastly, if you want grip panals there are a few sources for nice grips. Alumagrip makes a real nice one, but so does Hogue and Caspian and you can find used on these forums on occasion. If you need grip panels let me know as I have a bunch and have been meaning to do a garage sale in the classifieds.
As Steve said 4756 was a good powder that is now discontinued. Depending on the age they may be loaded for 175 pf if they were loaded for USPSA. If you have access to a chrono you could chrono a few and if you feel safe shoot the rest...or just pull them and reuse the case.
The Shuemann barrel is a good barrel, as long as it was fit correctly. They seem to like jacketed bullets more than coated or lead. If you are shooting major just pop for some Montana golds or Precision Deltas and get on with the loading. As for powders, you can search 38 super loads on this forum and find a lot of options. I have guns with three port Shuemann barrels and they seem to work best with the slower powders and either 115 or 124 gr jacketed bullets. Personally, I like AA#7 and has been my go-to 38 super major powder for years. HS-6 is good, but blasty to me. N105 and 3N38 are good and if you can get some are worth a try. Also, N350 is good...a little snappy but it is super clean. Autocomp and Silhouette are also good, but are like HS-6 as far as being blasty in a super (just my opinion - you can try them all and tell us what you like!)
Here is a person with a similar post from a while back. I am "Guest". My original "Bamboo" account (with a 2006 join date and a few thousand posts was nuked by a forum glitch)
http://forums.brianenos.com/topic/213601-newold-shooter-gear-question/?tab=comments#comment-2376056
A little TLC and some updating and that gun will run with the best of them.
Good Find, and enjoy open (they have cookies, but don't tell anybody!!!)