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Posted: 5/16/2014 5:04:43 PM EDT
| When reloading for the AR-15 is it acceptable to neck size brass if its going back into the same rifle? Do people do that or full length size their brass? |
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No.
Semi-auto weapons should be FL sized every time. That said - if you are firing your brass repeatedly in the same weapon, you can just bump the shoulder back once it is fire-formed for your chamber, and it will still be reliable, but you need to play with the sizing die for just enough shoulder bump. |
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Pay particular attention to the sections "Sizing" and "Neck Sizing".
http://www.exteriorballistics.com/reloadbasics/gasgunreload.cfm |
| Thanks everyone. I was curious because that's how I got really accurate rounds from my .257 Roberts. I'm just getting started on shooting and reloading the AR15. As to the comment about getting a gauge--to what gauge do you refer? I have a case length gauge and am getting Go, No Go and Field gauges. Are you referring to a case length gauge to see if my brass is lengthening or the headspace gauges? |
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Quoted:
Thanks everyone. I was curious because that's how I got really accurate rounds from my .257 Roberts. I'm just getting started on shooting and reloading the AR15. As to the comment about getting a gauge--to what gauge do you refer? I have a case length gauge and am getting Go, No Go and Field gauges. Are you referring to a case length gauge to see if my brass is lengthening or the headspace gauges? You won't need the headspace gages unless you are a gunsmith or are buying used rifles at gunshows. They are not useful for reloading. If you want a really useful gage to help your reloading, get the Hornady Head and Shoulders gage set and their bullet comparator. These will help you set up your sizing die and seating die. If you were single loading rounds directly into the chamber, you could conceivably use a neck sizer. Even so, you might be at risk of a slam fire for rounds that are too long. If you neck sized magazine fed rounds, you are definitely at risk of slam fires and failure to chamber. |
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This is very handy when checking/resizing once fired brass from unknown sources: |
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Quoted:
What gauge is being referred to here and how would I use it to ensure I don't have head separation? As I said, get this one - "...Hornady Head and Shoulders gage set and their bullet comparator. These will help you set up your sizing die and seating die. " |
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Quoted:
When reloading for the AR-15 is it acceptable to neck size brass if its going back into the same rifle? Do people do that or full length size their brass? Not only full length size, but full length small base resize if you are worried about reliability. |
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Quoted:
As I said, get this one - "...Hornady Head and Shoulders gage set and their bullet comparator. These will help you set up your sizing die and seating die. " Quoted:
Quoted:
What gauge is being referred to here and how would I use it to ensure I don't have head separation? As I said, get this one - "...Hornady Head and Shoulders gage set and their bullet comparator. These will help you set up your sizing die and seating die. " Get the kit, it will work with almost all other cartridges as well. http://www.midwayusa.com/product/479704/hornady-lock-n-load-headspace-gage-5-bushing-set-with-comparator?cm_vc=ProductFinding http://www.hornady.com/store/Headspace-Gauge-Kits/ |
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