Since you're going with a dedicated 'break in' I'm assuming you're working it up for CCW duty. You've made a good choice.
Be sure you clean the gun AND ITS MAGS when you get it before you go to the range.
Assuming you are going for CCW, I would do the break-in thing. To start I would shoot light, 185 or 200 FMJ. All you're trying to do at this point is to cycle the parts, smooth them up, test the mags and get YOU used to the gun. Since this can take some time, make it easy on yourself and shoot lighter recoil.
I consider this initial step done after the gun has been 100% for around 50-100 rounds depending on how many problems I've had. At this point all you know is that the gun runs ok with basic ammo and you know how to run IT. Your SR might run 100% through this.
My next step is to select my CCW ammo then make sure the gun runs 100% with it. Any gun should work ok with the FMJ from above but this will JHP. If has problems with your choosen CCW ammo, try another ammo. Reliability trumps some magic bullet's hype.
I carry a S&W 1911 Series E commander w/alloy frame. I carry Remington Golden Saber in 200gr. 230g is more difficult to control where I'm older and don't have the strength for fast followup shots. Remember; point of impact is more important than bullet type or weight.
The only bullet I've ever had problems with was a Hornady XTP in two 3" 1911. This bullet is used quite often in commercial CCW loads. The sides of the bullet are flat and would hangup on the feed ramp out of pure friction.
However, your SR should eat everything. You may consider polishing the feed ramp with metal polish and your finger. DO NOT use a machine to do this. It's too aggressive.
I consider night sites to be a must on a defense weapon. You may also wish to look at XS Sites. I think their system is superior to any 3 dot setup.
Enjoy,
Spike
