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Wandering seating depths???

FamilyMan

Sergeant
Full Member
Minuteman
Aug 3, 2011
720
0
Utah
I have loaded up a bunch of rounds for loads to test out and as i was seating them the COL off the ogive kept wandering on me from +or- .0015-.003 is this normal or what would cause it? i am using redding dies standard seater with the micrometer seater added to it. winchester brass .243 95gSMK and 105AMax on RCBS single stage press.Any ideas would be helpful
 
Re: Wondering seating depths???

First thing to check, are your primers all seated correctly? Any slightly protruding will cause changes to OAL. If not that then it could be an issue with the die or maybe excessive or inconsistent neck tension?
 
Re: Wondering seating depths???

often,triyng to obtain better consistency,we can be wrongly induced to use excessive,therefore often uneven force on press handle_with bad results,on entry level syntered aluminium presses as on superstrong steel ammomaster_
 
Re: Wondering seating depths???

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: FamilyMan</div><div class="ubbcode-body"> the COAL of the ogive kept wondering on me from +or- .0015-.003 is this normal or what would cause it?</div></div>
its normal. Its the way your using the tool. It can take some time to get a good feel. Sometimes the ogive tools work better with some bullets over others.
 
Re: Wondering seating depths???

Do you have a compressed load?

My personal experience: When reloading 155 .308 Scenars it's easy to get a compressed load and the COAL variations were quite noticeable. I decided to move to Winchester brass for my 155 Scenar loads since I could avoid compressed loads. However with Winchester brass you have to deal with neck thickness variations which is a whole other story.
 
Re: Wondering seating depths???

Neck turning WW brass improves them a lot. For that matter, neck turning improves just about any brass regarding neck wall thickness.

OFG
 
Re: Wondering seating depths???

Protruding primers, inconsistent neck tension "lack of annealing", inconsistent press stroke can be a small factor but usually just compounds the real problem , any compression of powder can cause variance.
 
Re: Wondering seating depths???

I've been having the same problem with my Redding Big Boss press and Redding dies with a micrometer seater.

I found that the biggest thing that helped me was changing my stroke. Repeating the same tempo and trying to bottom out with the same light force really cut my run out issues in half. Now I'm usually withing 2/3 thou every time for the most part.
 
Re: Wondering seating depths???

I have measured (base to ogive) near that much difference in AMax bullets in the same box of 100.
But, as already stated, consistent handle pull is key to consistent loads.
 
Re: Wandering seating depths???

More consistent use of your press and tools will probably help with the issue. I have a caliper with very sharp edge and I never take readings over a primer. Yes, I am aware the slight angle can add a thousandth or two, but it's so minimal it's nothing to worry about. And this is one reason why I don't do compressed loads any more.
 
Re: Wandering seating depths???

All of these are solid explanations. Most reloading/consistency issues I've encountered (to the precision we all demand) are usually a combo of variables - all of which have been stated in this post already.
I've become a firm believer in annealing, trying to maintain a consistent press stroke and in making sure the necks are consistent in thickness per side (or grouped/turned accordingly), and certain brass lots may take a different sizing bushing.

A good practical method I use for this problem is to separate the rounds I feel "different" seating pressure on, measure them later to confirm, and I group them in my ammo box accordingly. As long as I don't inadvertently dump my ammo box at a match and lose the order - it works for me.
 
Re: Wandering seating depths???

You can see that much variance in the bullets themselves. What are you using?
 
Re: Wandering seating depths???

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: flashhole</div><div class="ubbcode-body">You can see that much variance in the bullets themselves. What are you using?</div></div>
I Am using Redding standard sizing and seating dies with the micrometer seater added. With Winchester brass 105AMax's and 95SMK's and using the Hornady OAL gauge with Comparator. the part I don't under stand is even if there is that much difference in bullets when you run them through the seater it is seating it just off the ogive and shouldnt matter cause the only thing differences in bullts would change is houw much of the base is in the neck and The OAL off the tip not the ogive. Am I understanding this wrong? and the way I use the press and tools, I can kinda understand but i just don't see how the measurement between the part that contacts the bullet in the seater stem and the part the shell holder changes due to how I run the press, not that I don't believe you guys cause I do. I even went to the bench last night and ran the press 10 to 20 times to see how I was doing it. but even then I loaded some more up and I would measure one at 2.2875 and the very next one would measure 2.285 any ways another question that pops up is, Is that even enough difference to be noticeable in performance? remember I am a novice at precision shooting so am i just wasting my breath with this and just say if i am within +or- .002 of my desired depth I am good?
Thanks for all the help i figure if i am going to reload i might as well do it as accurate as possible even if my shooting skills don't match it yet
 
Re: Wandering seating depths???

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: FamilyMan</div><div class="ubbcode-body"> <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: flashhole</div><div class="ubbcode-body">You can see that much variance in the bullets themselves. What are you using?</div></div>
I Am using Redding standard sizing and seating dies with the micrometer seater added. With Winchester brass 105AMax's and 95SMK's and using the Hornady OAL gauge with Comparator. the part I don't under stand is even if there is that much difference in bullets when you run them through the seater it is seating it just off the ogive and shouldnt matter cause the only thing differences in bullts would change is houw much of the base is in the neck and The OAL off the tip not the ogive. Am I understanding this wrong? and the way I use the press and tools, I can kinda understand but i just don't see how the measurement between the part that contacts the bullet in the seater stem and the part the shell holder changes due to how I run the press, not that I don't believe you guys cause I do. I even went to the bench last night and ran the press 10 to 20 times to see how I was doing it. but even then I loaded some more up and I would measure one at 2.2875 and the very next one would measure 2.285 any ways another question that pops up is, Is that even enough difference to be noticeable in performance? remember I am a novice at precision shooting so am i just wasting my breath with this and just say if i am within +or- .002 of my desired depth I am good?
Thanks for all the help i figure if i am going to reload i might as well do it as accurate as possible even if my shooting skills don't match it yet</div></div> On the limits of my money,time,tools and brain,I repeatly have tried to grab the dream of my absolute reloading accuracy,only to discover that even if I can MEASURE ALL, really UNIFORMING ALL it's another matter,for several reasons beginning with my limited skills,continuing with the imperfections of mass-produced components,ending with any sort of profanities_ when I have different measures on my "perfect"(?)loads,I try to order them in growing order,or reverse,and shooting them in this order_sometimes my paper targets says I'm ok,sometimes not_don't matter:I have tried at my best_ somewhere I've readed a quote from Walt Berger(!),more or less sayin'"more I shoot,less I understand"... _If not all,we are not alone_reload,shoot,and enjoy!