Hollow points in a bullet made for varmint hunting will fragment and not over penetrate. However, a hollow point in a Match type bullet is there to ensure the bullet is more base heavy for enhanced accuracy. Hollow points in a match bullet should not be expected to "upset" and " blow up", although some might just from striking a hard object up close when velocity is still very high. Bullet manufacturers are quick to point out that the hollow point in a match bullet is cosmetic and does not mean that they are expanding bullets. Most people threat them like a FMJ as far as expansion or upset. Best to use if over penetration is a concern would be one of the frangible loads, next best would be a thin jacketed varmint bullet like the Hornady SX or V-max, or the Sierra Blitzking. Note that none of these very explosive varmint bullets are hollow point, the SX has an exposed lead tip, and the Blitzking and V-max are polymer tipped.