Modern Sporting Rifle Evolution
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adam38654

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Reply with quote  #1 
Im setting the head space on my savage 277wlv bolt action with once fired and resized LC brass that has been resized again in my Lee FL sizing die. Can I set the headspace to zero because all ammo will be hand-loaded for this rifle or should I add a .002 piece of scotch tape to the case to add clearance for the future incase I switch to a different brand brass that may have a thicker rim?
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lizARdman15

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Reply with quote  #2 
Shooting for the exact headspace when resizing is an imperfect art. And one that you don't even need or want to do. The case needs a little space to expand and contract to break free from the chamber on extraction.

But really, you will find it nearly impossible to resize every case to the exact dimensions of your chamber due to slight variations in metal "springback".  

I shoot for .003-4(realistically up to .006-8 is acceptable), but on bolt rifles you can try for maybe a thousandth tighter.

Good luck
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ussrangersm3

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Reply with quote  #3 
Invest into this headspace gauge... leave the Scotch tape in your drawer, and shoot for a .003 clearance from your chamber( you could be a little tighter because it's a bolt gun, but what I'm saying is take the guessing out of it)


https://www.amazon.com/Hornady-Lock-Load-Headspace-Gauge/dp/B000PD5VN8/ref=sr_1_1?ie=UTF8&qid=1491572448&sr=8-1&keywords=Hornady+headspace+gauge

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wikster1983

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Reply with quote  #4 
Quote:
Originally Posted by ussrangersm3
Invest into this headspace gauge... leave the Scotch tape in your drawer, and shoot for a .003 clearance from your chamber( you could be a little tighter because it's a bolt gun, but what I'm saying is take the guessing out of it)


https://www.amazon.com/Hornady-Lock-Load-Headspace-Gauge/dp/B000PD5VN8/ref=sr_1_1?ie=UTF8&qid=1491572448&sr=8-1&keywords=Hornady+headspace+gauge
I completely agree- rent them from JBFA or if you might do 3-4 or more order them from pacific tool &gauge (about $100 is what it cost me). Cheap insurance for safety!
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adam38654

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Reply with quote  #5 
I resized 3 LC-03 head-stamped shells with my LEE die, took them to work, and set the headspace. It closed easily on all 3, and wouldn't close when I added a .004 coke can shim to the bolt face.

When I got home those 3 would close easily but more resized from the same bag of brass with the same headspace closed with resistance and a light crush fit.

My JB firearms 90gr GD chamber easily but my RedStag 90gr TNT have a slight crush fit.

Now I am paranoid if I have a nice tight headspace for good accuracy or If I will have trouble chambering certain ammo.  As is I would have to shave some off of my shell holder to get enough shoulder setback to chamber easily with some shells.
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