I don't know how many times this question has been posted, but I will repeat my previous warning that the Winchester model 1903 was made for a special cartridge called the .22 Winchester Auto, which is long obsolete. Firing .22 Long Rifle in it may cause split cases and/or damage to the rifle.
That is why when Winchester came out with an autoloader in .22 LR, they gave it a new model number, 63.
Jim