David Tubb crimping bullets

[limazulu]

I'm looking thru the latest Creedmoor Sports. In the back it lists a DVD, Sierra Highpower Rifle Reloading with G. David Tubb, Jr. In the description it says, You'll see how he selects his components, ... how he seats and crimps the bullet.

I thought most people here, me included, thought crimping was a waste of time and could even effect accuracy. I didn't plan on buying the DVD, I just like to read everything.

I was just wondering if anyone ran across the reason David Tubb gave for crimping his bullets?

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[P. Greaney]

I have the video, which I purchased and viewed years ago.
I don't recall him crimping bullets or advocating doing that.

[Kirk]

This isn't David Tubb's answer; it's my own experience crimping the 77 gr SMK in the .223 for use in an AR15 with a 1/7" twist barrel. I worked up loads with everything being the same except one batch of loads was crimped with the Lee Factory Crimp Die (the only die I'd use as the 77 gr SMK has no cannelure) & the other was batch was not crimped. When I compared groups, both batches gave excellent accuracy but the groups made with bullets crimped with the Lee Factory Crimp die ran about .1" smaller. With the 80 gr SMK, results were just the opposite - uncrimped bullets shot better.

When that barrel wore out, I had the rifle rebarreled with a 1/8" twist barrel & repeated the tests using the Hornady 75 gr HPBT & the 80 gr SMK. This time, groups were equal in size. Since there was no no advantage, I stopped crimping bullets.

My point is that you won't know if there is any difference unless you try. Also, the Lee Factory Crimp Die is the best crimp die made, regardless of brand or price. There is no danger of collapsing a case neck.