Lapua .223 web thickness?

[Doug Beach]

How thick is the web on current production Lapua .223 brass?

 

[Texas10]

Don't know how you could arrive at a concise answer to your question, as every place you'd measure is tapering. Maybe best to measure internal volume? IDK.

What's your concern?

 

[Rocketvapor]

I remember years back the concern over reloading thin web federal .223 brass.
I think 0.170" was the oops point.
Could probably google the issue.

 

[Ned Ludd]

The best you'll likely get is a relative value. For most purposes, it's much easier and more meaningful to measure internal case volume. Nonetheless, there was a thread not too long ago where someone had performed case head cutouts for several different types of .223 Rem brass, which clearly illustrated the differences in case head thickness between different brands. It was a very interesting read. I don't remember whether Lapua was one of the brands examined, nor can I find the link, although I was certain I had bookmarked it. If you search in the .22 centerfire section, you might be able to find it.

 

[Texas10]

I remember that chart has appeared many times on this site. Trouble is, it's old information that I personally found was not accurate in some cases. For instance the Federal 223 cases sectioned showed a much thinner web at the flashole, but when I sectioned my Federal 223 cases, they measured same as the thickest ones on the chart.

Since many ammo producers contract out the brass making step, harvesting brass from loaded ammo will yield various, unpredictable results.

I just bought 200 new LC-17 cases, and having received 201 i'll section one just to satisfy my curiosity. But the only time I've run across the thinner web cases was in the cheapest, loaded ammo that was for 223Rem, not 5.56.

 

[Rocketvapor]

A quick check with a rod and digital calipers will show you web thickness.
I used an aluminum rod cut from one of the wife's knitting needles.
Flat on one end and concave just a little on the other.

This might be an image from an earlier article
FC223 in the middle.

 

[Texas10]

Updating regarding web thickness at the flash hole in new LC 17 brass is .065

 

[LVLAaron]

The thickness is sort of pointless unless we also understand the metallurgy/composition/hardness of the brass in the area that we are measuring.

 

[watercam]

Having rotated 400 pieces of brass in 100 rds. per/box for 6 firings in Highpower Competition I can tell you that the Lapua brass is no tougher than any other. My experience with their .308 Palma .308 SRP brass lasted 31+ firings before I had to retire them (annealed every 4-5 firings). The .223 brass feels as if they might go another 2-3 firings before they will not hold a primer. Not saying I am disappointed but was hoping they might make it to 10.