...FWIW, the Aero nitrided BCG/bolt claims to be a "HP" type bolt, i.e., a smaller diameter firing pin and firing pin hole. The intent is to reduce the possibility of primer brass flow back into the firing pin hole when the round is fired, resulting in primer "cratering", a visual cue of possible over-pressured loads (not always a true indicator). Based on my rudimentary (calipers) measuring of the firing pin hole diameter of the nitrided Aero bolt, it is "smaller" than the firing pin hole found on my Aero phosphate bolt used in my M5 .308 build, but still larger than the advertised diameter of the JP bolts. As for the possible effects on "accuracy", opinions abound, but IMHO many posts appear to be anecdotal at best with little data tests across multiple platforms to support it, YMMV. A properly tuned recoil system does more to prevent the "primer cratering" typically referenced as the source/cause of "over-pressure" as well as mitigating the effects of BCG slamming back & forth during operation that DOES have an effect on experienced "accuracy". If anything, if the barrel brand you intend to purchase offers a matching BCG/bolt, get it, as this implies the barrel manufacturer has tested the recommended bolt with their product for proper headspacing and compatibility with their barrel. This assumes you don't have headspace gauges (GO/NO GO/FIELD) at your disposal to check for yourself, and the knowledge of how to conduct the checking. A basic GO/NO GO set can run about the same as a bolt, maybe even more depending on source.
The AR10/SR25 realm does not have a "true standard", unlike the AR15/M16/M4 so is can still be a crapshoot when sourcing individual parts for a build.
Reliability should be your primary objective in your parts selection, "accuracy" can be enhanced via many other aspects of the build, ammo, components (handloading), but a reliable platform is paramount first.
Edited: Forgot to include that if you get a "HP" specific bolt, you will also need to get the firing pin for that particular bolt as dimensionally it will be different from other brands/models. I'd recommend getting a couple.