07-31-2011, 04:33 AM
If you are seriously worried about glass penetration and still having enough bullet on the back side to do the necessary damage, you can't go wrong in .223 with the 60 gr. Nosler partion. Even in the 10.5 inch guns they hold together well and have little or no deviation at less than 30 deg. angle on the windshield. I was involved in the testing of every commercially loaded 223 we could get our hands on and it beat all hands down including the Military steel penetrator. Most fragmented so badly that penetration in geletin was minimal. The Nosler retained 90+% of its mass and penetration was 10 or more inches.