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Glaser Safety Slugs come in two forms; the blue-tipped bullets encase No. 12 shot and the silver-tipped bullets No. 6 shot. Previous tests showed you can expect about 7 inches of penetration from the silver Glaser Slug and the blue-tipped bullet drove shot and jacket fragments to around 6.5 inches. Surprisingly, penetration depth did not vary when the bullet was fired from a 5- or 3.3-inch barrel, even though velocity varied by as much as 150 fps. However, the wound cavity was noticeably larger from the bullet with the higher velocity.
| Load | Handguns | MV (fps) | PEN (inches) | EXP (inches) | RW (grains) |
| .45 ACP Glaser Blue Safety Slug | Nighthawk GRP 1911 (5-inch) & Sig 1911 Ultra (3.3-inch) | 1,200 to 1,350 | 6.5 | N/A | N/A |
