Welcome to the club. While mine isn't one of the most highly sought after, it has preformed well for me over the past 20+ years. Mine is the IAI Javelina with the 7" barrel and long slide. It's a sweet shooting piece of machinery.
While some claim to have found them to be poorly machined, mine came out very well machined and has been accurate over a wide range of loads from the 135gr pills up through the 200's using a variety of powders. I found that the 180gr bullets shot the best overall however and concentrated on them early on. As such the mainstay of my loads have been with the 180gr Gold Dot, as a primary, and the Winchester bulk 180gr JHP's for practice. Both of them shoot to the same POI and group close enough I cannot tell much if any differences out to 50yds.
If you loading your own you will find this to be about as easy as putting together rounds for the 45 ACP. There is quite a bit of data avaliable for most powder manufactureres listed online and plenty more in the reloading manuals. Personally I found the Accurate powders to be ideal for my loads and very simple to keep track of. I used #5 for the 135-140gr bullets, #7 for 150 - 175gr, and #9 for everything heavier. With #9 and the 180gr Gold Dot I can easily hit 1350fps from the 7" barrel with no pressure issues. This said, bumping velocities up in shorter barrels, can get into flattened primer territory pretty easily. While there are some who have had great luck with 800X, I found that in the area I live the temperture swings, combined with upper end loads are simply too erratic for my liking. WHile it may produce some pretty impressive velocities, it isn't nearly as consistent as the Accurate powders have been. One thing to consider if you plan on using yours to hunt hogs, there are plenty of good bullets for this caliber but the Remington Golden Sabre isn't one you want while hunting. While I found it to be EXTREMELY accurate, I also found that it didn't provide enough penetration for reliable hunting purposes. It might be great for a SD situation where you want a quick energy dump, but they simply do not get the job done on a thick hided hog. This is where the Gold Dot really shined for me as an all around choice. THey are simply the Core Lokt of the handgun bullets, providing the same great performance time and time again, when driven within the proper velocities. THe following pic was a result of a quick hunt I went on with my friend. We dropped 11 hogs in 45 minutes from the time we left until we were back to his barn. The three loaded on the back deck of my Polaris 400 were dropped with my 10mm at around 12 yards max. The little one tucked in between the other two was collateral hit from a pass through.
I also found years ago that Starline cases are hard to beat, and will hold up to as many loads as your able to retreive them for. I cannot say that I have ever actually loaded any one case to the point of discard before loosing the darned thing. THis will however depend upon the support of your chamber as well.
Good luck with your new found acquisition I am sure you will have a ball working through the different ammo whether factory or home rolled. They are a hoot to shoot.
