Quoted:
1:7 –– barrel length doesn't matter in my experience for twist so with the pistol, why not go 1:7 and get the most accurate round you can? I know it's arguable, but that's my experience.
Very arguable. There is a reason varmint hunters use slower twists for their lighter bullets, and it has everything to do with accuracy. The proper answer would have been, "It depends on the bullet weight you intend to use most of the time".
My take is that if you are going to use the lighter weights, use the slower twist. For heavier weights use the faster twist. Since these are pistol length barrels, it makes more sense to use heavier bullets if you are going to do anything other than paper punching. Therefore, unless your pistol is just a range toy, go with the faster twist for heavier bullets. That's my opinion.
Now, if excellent accuracy is your primary concern, there are a lot more variables to consider. For instance, you typically don't get great accuracy with a chrome lined barrel. In .224 diameter bullets, the lightweight varmint bullets tend to be very accurate, so you would want the slower twist.
Use the right tool for the job.