bob
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I'm too old to be nice but never too old to learn!
Posts: 1,457 
Location: Northern California
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Post by bob on Mar 28, 2017 23:47:35 GMT -5
I'm probably wearing the subject of the RCBS competition seating die a bit thin (or a lot thin) but I loaded some .218 Bee in W-W brass and some .243 Win. in Nosler brass and the run out never got more than 0.002" with most being substantially less. The cartridges were checked with both the RCBS and the Hornady concentricity gauges.
On the subject of the .243 I'm trying H 1000 behind 100 gr bullets, I've not used H 1000 in the .243 before so will see.
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SnapShot
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Jeep & Mocha "Remembering Patches, always"
Posts: 699
Location: Finally free from the Republic of Kalifornia!
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Post by SnapShot on Mar 29, 2017 10:25:07 GMT -5
Bob ~
I understand the value and appreciate the available equipment we have these days allowing us to measure and adjust the alignment of bullet seating. However I don't have a feel for the impact on a measured group at a given distance. Now that you are doing all this work, do you have a feel for the difference it all makes? If you load a good performing reload with no special attention to bullet seating (using typical reloading dies) and the same load with your extra processes what difference in group size do you see?
Don't get me wrong, we all want our reloads and rifles to perform with maximum accuracy but I have never seen anything showing the results of true run out vs typical reloading procedures.
~ Thanks, Larry
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bob
Member
I'm too old to be nice but never too old to learn!
Posts: 1,457
Location: Northern California
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Post by bob on Mar 29, 2017 11:56:38 GMT -5
Larry, The difference is very slight if any, I just want to give the rifle the best opportunity I can. This probably is over the top for my shooting ability and needs which are informal target shooting and hunting though for hunting I want competition class accuracy.
I got started with this(measuring run out) back in the RCBS forum time due to discussions about accuracy and thought I'd try it out. The offshoot was the comp die which, regardless of any improvement in accuracy, are a pleasure to use.
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poohzilla
Member
Give me a place to stand and a long-enough lever, and I will invariably break the lever.
Posts: 1,050
Location: New Hamster
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Post by poohzilla on Mar 29, 2017 12:00:29 GMT -5
Larry, I don't have anything with stunning mathematical certainty, but back when I was shooting High Power, I'd just gotten to a point where I could call my shots reasonably, and I'd have a neat little group and one wide flyer, which I hadn't called. It would be a couple of rings over at 200 or 300 yards. I was frustrated-if I owned it, I owned it, but I couldn't figure it out. One of the oldtimers (He may have been 45 at the time) took me aside and we had a chat about runout. He lent me a gauge and I found there were samples of my stuff that were way out there. I bought a set of match dies, which did a little better, but ended up with of all things a Lee seating die that gave me runout in the range Bob's talking about. (I also started taking the runout gauge to Leg matches, and started measuring the runout on the issued ammo, sorting it, and marking the high spots on each. I didn't go distinguished, but I did mess with a lot of people's minds !) If you're calling your shots honestly, and you can't account for an occasional flier, runout's a good thing to check.
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SnapShot
Member
Jeep & Mocha "Remembering Patches, always"
Posts: 699
Location: Finally free from the Republic of Kalifornia!
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Post by SnapShot on Mar 29, 2017 18:32:10 GMT -5
Thanks guys. You've confirmed my thoughts on the subject. Now, with that said I must tell you I am planning to move soon and in that process I will have to build out a new reloading area  (the upside to moving). I intend to add enough space to accommodate room for equipment to do the run-out measurements (looking at Hornady equipment at this point). I already have some precision dies for the 308 Winchester. In reality I must admit that most days my equipment and ammo is more capable than I am but I just have to move to the next level. I think that's what drives most of us |
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bob
Member
I'm too old to be nice but never too old to learn!
Posts: 1,457
Location: Northern California
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Post by bob on Mar 29, 2017 23:27:50 GMT -5
That Hornady Gauge is easy to use and provides a method to correct the run out. As I said I also have the RCBS gauge it allows more and different measurements but so far I prefer the Hornady tooland Larry mine is not mounted to a bench it is substantial enough to stand alone, actually neither are not mounted.
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(the upside to moving).
My daughter came from Missouri, my son and grand son, my wife and I had a nice dinner of grilled "porter house" pork chops, corn on the cobb, my son, G'son and I share 10/5. G'son is 4 minutes early though @ 10/4.
Pooh I hope you find to right house . 
