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Reloading Techniques For Reloading


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I need some help explaining this one

 
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  #8  
Old 06-09-2005, 07:13 AM
 
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Re: I need some help explaining this one

Not sure how much neck turning you are doing....

I personally hate to turn necks.. ie: for a specific throat dia. HOWEVER,

I "turn necks" only to make then uniform... meaning.. i just take enough off of them to make them more specific. Typically when I am done turning alot of my necks only have some brass shaved off on one side... I am after uniform thickness not a specific dimension.

as far as your velocity.. you are right on the money.. I have found that with the 6.5/284's I have had anything over 2900 fps may tend to decrease accuracy... so to speak....

FWIW....
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  #9  
Old 06-09-2005, 08:13 AM
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Re: I need some help explaining this one

Lablover,

Not sure the specifics of your set up but I will tell you that I have found that with factory rifles, what we think would be the most consistant loads using quality snug fitted brass often do not produce the finest accuracy.

In fact in many factory rifles, I have found that a full sized case that basically falls into the chamber is the best shooting load, why??

Well, in many cases it is because the bolt locking lugs are not contacting evenly and when a snug case is chambered it preloads the bolt body at a cant.

I don;t know if you have had your rifle trued up or not but this is not uncommon from what I have seen in many factory rifles.

I had a Ruger 220 Swift one time that I could not get to shoot under about 1 moa. This was a heavy barreled varmint model. This was many years ago and I tried every load I could think of with no good results.

Finally my brass was beginning to wear out so I ordered in virgin cases and loaded up some 50 gr Ballistic tips and oddly enough they averaged under 1/2 moa for five shots????

Second loading they averaged 3/4 to 1 moa so I set down to figure out what was different. Then I full length sized the hulls and things dropped back down to 1/2 moa or less.

Since then the rifle has been trued and this is not a problem any more and it is now a 22-6mm AI but I have found this with many factory rifles.

Something else to look at.

Kirby Allen(50)
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  #10  
Old 06-09-2005, 09:18 AM
 
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Re: I need some help explaining this one

Great advice so far. It's a head scratcher for sure. I was cleaning up the necks as well. 70-80 % of the neck was hit.

Heck, I even had some loads left over from the very first loading and theydid not do as well as the first trip. So, It could be me. I did notice myself canting alot but not sure how that was affecting me at 100 yards. Also the wicked wind the R/O spoke about by the wall

Fifty..Yes, the action has been trued etc.

I'm gonna do some more shooting and go from there. Hey, if I dont need to neck turn, then why bother. It's not a tight neck or anything. I just want to find a load and shoot. I really dont want to get wrapped up in too much testing with this gun. 5 shots under a half inch is more than good enough.

Well, thats what I say anyway [img]/ubbthreads/images/graemlins/smile.gif[/img] I'm gonna run the test again and go from there.

You get so involved with i.e. jam it into the lands...Leave it .20 off the lands...YIKES! Enough to make ya crazy.

Almost forgot to mention. This is New Lapua Brass

Take care

Joe
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  #11  
Old 06-09-2005, 11:01 AM
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Re: I need some help explaining this one

Joe -- for some reason, the best groups ususllay come during fireforming.

THat is why i have no qualms FL sizing every time!

what is your neck diameter? 297 im guessing?

If i had a no turn neck, i wouldnt turn either (building a no-turn 6br right now)

i'll take your once fired brass if you are going to stick with virgin only [img]/ubbthreads/images/graemlins/grin.gif[/img] [img]/ubbthreads/images/graemlins/grin.gif[/img]

JB
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  #12  
Old 06-09-2005, 11:14 AM
 
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Re: I need some help explaining this one

sounds right on the neck.

Just did some resizing now and will see what happens. Funny thing, I yanked the expander ball out of my F/L resize die Sized a few case and had ZERO run-out. This is with the Redding standard die. Think I'll try that instead of my Redding type S F/L bushing die. Heck...Who knows right. I'm curious to see what the once fired no neck turn stuff does..

Joe
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  #13  
Old 06-09-2005, 12:00 PM
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Re: I need some help explaining this one

I don't know how neck turning can do anything but hurt you in a barrel with factory dimensions. I have always found best neck clearance to be in the area of between .0005 and .0015, on a side. Why people will jump into neck turning without a clue as to what the real chamber dimensions are is a mystery to me. Is there some kind of religious prohibition against chamber casting? How does it make it more accurate by adding more slop? If you try telling me that it is to make the necks more uniform, then I going to tell you, you've already got a problem with lopsided brass that neck turning is not going to help. Does anybody wonder why short cases tend to shoot more accurately than long? Could it be because it's easier to make a short even thickness case than a long even case? [img]/ubbthreads/images/graemlins/grin.gif[/img]
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  #14  
Old 06-09-2005, 01:18 PM
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Re: I need some help explaining this one

I see School of Thought #1 has weighed in.

Some of us just have a lot of frog chromosones in us and "will jump into neck turning without a clue".

Yes, it has occurred to my to try to remember where I put the chamber cast for the 240Wby.

As far as religouis prohibitions goes:

I do believe that God did issue some instructions on neck turning and Lot's wife ignored those instructions and turned her neck and as punishment God transformed her into a pillar of salt. So 3sixbits it does seem that you are right [img]/ubbthreads/images/graemlins/grin.gif[/img]
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