It is very hard to imagine a 0.002" larger LEAD bullet increasing pressure. It is about 90% softer than copper/gilding metal. 9x19 has historically been fired with 0.358-0.359" lead bullets with no change in loading data.
Many folks get better results with a 147gn bullet — more, I believe,due to lower velocity than any inherent accuracy of the heavier bullet. I 'think' this since 147gn bullets have not been more accurate in any of my 9x19s than 124gn bullets, on average.
My philosophy has been, since my as-cast bullets have always been as accurate or more accurate than my sized bullets, why bother sizing? If it doesn't make the load more accurate, it isn't going to be done.
I get very good accuracy from the Lee 102gn L-SWC, as-cast and tumble lubed.
The 115gn and 125gn L-SWCs are very accurate, with my nod going to the 125gn L-SWCs. Likewise, the 124gn Precision Bullet "black bullet" is also very accurate — the moly-kote seems to prevent leading and help accuracy even though the bullet is not a large as I would like.
An off-the-wall commercial bullet that has done well for me is the Missouri Bullet "Cowboy #17," a 0.357-0.358" 125gn 12 BHN L-RNFP. I think some will be put off due to the crimp groove being exposed and not being aesthetic or something.
I shoot my own and commercial L-SWCs in all my 9x19s, except a Browning Hi-Power with a groove diameter of about 0.3595", and they work well even in pre-WWII Lugers and WWII Walther P-38s.
The "best" lube I have found is LLA--two light tumbles works better than one light or massive tumble.
When I am through my existing stock of my cast bullets, I plan to try 45/45/10, but that might still be a few years away.
Just like in the '70s, some of the most accurate bullets will be jacketed 0.357" and cast 0.357-0.358" lead bullets.