Actually, I've been doing it with short-chambered Brit guns. I see that the Baker Sterlings were made from 1909-23. Service pressures back then were running around 10,000 psi for factory loads, but I always go lighter to be on the safe side and as gentle as possible with older guns. Others may well weigh in, but I'd say you could go up to 8-8500 with reloads without any concerns, assuming the gun's in sound condition.