I recently started to work on a new project - a sporterized M1917 Enfield. Just today I noticed the bolt I bought some time ago has a solid grasping ball! Never seen that before. Went to the gun safes and verified that all three of my P-14s, all three other M1917s and even my Remington Model 30 have the hollow balls. Has anyone ever seen one or heard of the solid one? If it's filled in, which may be the case, they sure did a great job!