I wouldn't be worried, I would consider it an extra value because it will add life to your barrel by giving you more steel to erode.

My first Savage .308 had a chamber that was 0.080 longer than SAAMI from the factory. I shot 6500 rounds and the chamber eroded by another 0.090 making me seat the bullets out longer and longer to maintain the jump. After 6,500 rounds I was seating the rounds out at 2.970 compared to the SAAMI 2.800 recommended O.A.L.
At that O.A.L. I couldn't maintain consistent neck tension and had to rebarrel. I figure that deep chamber cost me about 5000 rounds of use.
I consider consider a short chamber a gift instead of a problem.