I've got vintage from 4-5 yrs old 4 1/4" to a month or two ago 5" all in 9mm. They seem to shoot the same. I use either 147gr lead or 125 Hornady HAP bullets. Depends on indoor or out etc. They all shoot about the same, 2 1/2 to 3" groups with the good handload at 25 yds. Never felt like I missed a plate or A zone because of gun. Hope this helps