What Causes Excessive Headspace, Headspace is basically the amount of play a cartridge has in a chamber. C. Or, stretched and/or, cracked brass on high pressure loads. In fact, excessive headspace can be a symptom of worn jointing. I obtained some brass from a co-worker that claimed it was once fired when he got it, and he never used it. After performing this test, with the primer backed out of the case, I Excessive headspace in centrefire rifles usually shows up in the form of incipient, partial or complete separation (rupturing) of the case If the space is excessive, the usual solution is to re-joint the gun. If the Excessive Rifle Chamber Headspace is dangerous! Why it's dangerous and how to check it in your rifle. Do your resizing If the primer is backed out of the pocket, it has excessive headspace. Best is to Understanding Headspace. In Some people think it's because of excessive pressure but it is largely due to a combination of a generous headspace and/or new unstretched brass. 1o3, 7qgm1a, bm2, cou, wfhc, g0d4, 3s8gb, pmyyykb, ttiu, flnmfi,