100 yards is certainly doable for the gun. Only you can tell how far you can place the bullet well with your gun. With a good rest I can put three shots in a 3-4 inch group at 100 yards with my SBH Bisley Hunter. However I have been shooting handguns for 45 years. It takes practice and you better not wiggle.
A very good trigger is a must for longer range pistol shooting.