Flash hole beburring is it worth it ?

Reloading equipment, methods, load data, powder and projectile information.

Re: Flash hole beburring is it worth it ?

Post by kthomas001 » 17 Oct 2018, 12:35 pm

If you want a definitive explanation of why you should deburr primer flash holes, you might want to read 'Modern Advancements in Long Range Shooting', authored by Bryan Litz. If you haven't heard of Litz he is the chief ballistician for Berger Bullets and is literally a rocket scientist. In the book Litz dedicates a whole chapter to the subject and concludes that "deburring....can in fact have a dramatic effect on ignition, and the resulting consistency of muzzle velocity". The results of the testing he conducted clearly show an improvement in standard deviation.

I would only use a purpose-hand tool made for the purpose (Lyman make one). You need only remove the burrs, not drill a hole.

I shoot a 6.5 Creedmoor Surgeon, and routinely deburr the primer flash holes of my cheaper brass with a resulting SD of 3.1 fps.

Hope this helps.
kthomas001
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