Howcome ?

[Zazu45]

Sorry, actually that was only one of the loads I tried.
This next picture shows three different steel loads and one lead for reference.
no.1: Winchester Super double X 3in. mag. 1 7/8oz BB (lead)
no.2: Winchester Expert 3in.mag. 1 3/8 oz. no.2 (steel)
no.3: Win. Supremes 3in.mag. 1 1/4 oz. BB (steel)
no.4: Win. Super X "Drylock" 3in.mag. 1 1/4oz. "T" (steel)
Ammunition availability in my area, has limited me to Winchester ammo so far. I intend to try something else soon.