I have several Do-All brand self healing targets. Two are the 4 inch box targets and one is the 9 inch gong style, both of these, or all three if you wish, have absorbed hundreds and hundreds of 22 rimfire hits, and hundreds of centerfire rounds. In the case of the box targets it has mainly been 45ACP; 230 gr ball and 230 gr hollow point, 38 special; 130 gr FMJ, 158 gr round nose lead and hollow point and 125 gr JHP, 357 Mag 158 gr JHP, 158 gr half jacket lead, and 140 gr jacketed semi-wadcutter.
The 9 inch gong has taken hundreds of additional hits, in addition to the 22 LR/22 mag, from 30 carbine and 223 Remington, both ball ammo and hollow points, as well as uncounted numbers of 45Colt fired from a selection of lever action rifles.
The box targets are in better shape because they "bounce around" after getting hit and so take hits over wider area, while the gong has tended to take more shots in the center of its mass. But both are still usable.
http://www.doalloutdoors.com/product-ca ... pact-seal/
I've been asked: "How many guns do you need to have?" My answer remains the same: "One more."