The extra bit of travel for the bolt to push the pellets past a larger barrel port works. A 5min job with dremel. Limiting the barrel port to .19 to prevent the pellets falling in the transfer port, nonsense.
I just noticed that my air tube has a hole for a factory valve meter screw. Arghh. Why, why, why. Why would I need that hole there when I also specifically had the transfer port hole specified for a JSAR valve.