With 53's, 2.240" is book, mine are at 2.230" OAL.
As an alternative, 25 grains of Ramshot TAC gives equivalent accuracy with a bit more velocity, as I've found, tho YMMV. TAC is what I used last time I loaded for shooting P-dogs in Wyoming. Made up 600 rounds and still have 200 left for next year. I alternate shooting .17 HMR, .17 WSM, then .223 for the longer shots when I go out there, just to keep the barrels from getting too warm.
That's what's I've found works for me, rimfire at 200 and under, then when they won't come out anymore, stretch it out with a centerfire cartridge.