Got the Flex today & shot a few across the chrony. I want to speed it up to about 920-930 with 25gr kings. Right now I can get to to 850but it’s an air hog. Is there a good starting point on adjustments to start from?? The reg is set at 1800 & I turned the hammer spring 4 turns from where it was at to get it to 850. Any info is much appreciated.