change of neck tension Part 2 - Range results

TackDriver284

Handloader
Feb 13, 2016
2,314
1,561
Went to the range early, first gun up was the .308 All brass tested was SS tumbled to bare brass inside necks. Loaded up 168 grain SMK with 43.6 grains of Varget, and this time I full sized with a RCBS full sizer. I usually use the neck sizer but wanted to bump back .002". Load used is the same as before SS tumble which shot very well around half an inch to 3/4 at 300 yards. Test at 300 yards on a random target that was left on the post. This group is outstanding. Looks like under half an inch.
Mn0P3Mc.jpg


Next test is the .308 again with 168 grain Ballistic Tips that I will be using for deer season. There are two groups out of 6 that shot nicely at 300 yards. Loads were picked according to ladder test from two weeks ago. Full sized and SS tumbled as well. 44.4 and 44.8 grains. I'll pick the 44.4 grain charge and 2,765 fps is fine, deer / hogs won't know the difference.
JJ4teJb.jpg

QWmJSTw.jpg



Next gun up is 7 Mag that I worked up a ladder test. Full sized and SS tumbled as well. Selected two charges of 72 and 72.8 grains of Retumbo and the 160 AccuBond. Range is 200 yards. 72 grains did not shoot well, but the 72.8 grain charges did somewhat OK, put two in one in the bullseye and one little flyer above it. It could have been me, the rifle is a Sako M995 custom featherweight 26 inch barrel and so light that you can barely make it sit still in the saddle of the bull bag. Velocity is a nice 3,103 fps.
r36LAvG.jpg


Last rifle is the 6.5 x 284 custom Rem. 700 with a .286 neck Loads used was 50.6 grains of H4831SC and Lapua brass that was not SS tumbled but was already in the vibratory tumbler last week. Shot at 6 inch gongs only at 300 yards, nothing but tight clusters of less than an inch with 5 shots x 3 gongs. Hard to tell measurement when you only see a grey spot on the gong.

I had full sized and loaded up 5 rounds of 6.5 x 284 brass that I threw in with the SS media a few days ago, but could not chamber it at all. Upon inspecting the brass, the mouths have a little bell mouth with the loaded rounds. That is weird and never happened to me before. I needed to check the dies and see what is going on. I loaded the 6 SS tumbled brass the same day and also for the loads that was shot at the gongs that was neck sized only, but no issues with those batches. I measured the mouth ends and neck ( SS tumbled brass ) with the loaded rounds and its .287" on the mouth end and .285" on the middle of the necks and the other rounds I shot at the gongs are .285" on the whole neck which was neck sized. So there is a variance of .002 more on the mouths. Pulled the bullets and Deprimed the 6 cases and resized with the neck sizer, and its back to normal at .282" neck and sized one case with the full sizer and it did it again with that little bell on the end. Anyone know what the issue is? Did I set the die wrong? I never used the full sizer for this gun because the necks cannot be sized, necks are turned to .286" by the gunsmith that built my gun long ago. Maybe I should bump back .002" with the body die and neck size it with the Competition neck sizer. I just never used the body die before either.

With the range results, I am happy. (y)
 
Well. I'm with you. Something is not right. So verify everything.
Bullet checked on a mic? Wall thickness on case. Is the die in too deep? (Same logic as the case being too long. Bumping the neck..

Will be interested in the resolution.


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mjcmichigan":3iowrab5 said:
Well. I'm with you. Something is not right. So verify everything.
...

Sine the fl die is new to this setup, try backing it out a 2 full turns.
Run an unsized case... measure it.. turn the fl die in qtr turn, run the same case in, measure a gain repeat until you get the bump.

The dies are 14 pitch. 14 turns moves the die 1 inch.
If I did the math right, 1/8th of a turn is 0.009".

Two turns would be
0.14". Moving in 1/4t turns would be..0.017

If you guys want, I'll make a reference table.

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mjcmichigan":37go46gu said:
Well. I'm with you. Something is not right. So verify everything.
Bullet checked on a mic? Wall thickness on case. Is the die in too deep? (Same logic as the case being too long. Bumping the neck..

Will be interested in the resolution.


Sent from my iPad using Tapatalk

I checked my 6.5 x 284 fired case headspace in the bell mouthed cases and its .001" less than a fired case. It's the way I like it and as for case length and trim is just the right length. I checked my 6.5 x 284 Redding full sizing die on why the mouths of the loaded case has a .002" bell on it. Took the die apart and found that it has the grey expander button that comes assembled with the die and took it off and put the little black button that comes with your die set in a little plastic bag which does not touch the inside of the necks at all. I believe it is this : https://www.midwayusa.com/product/12733 ... n-kit-65mm
Resized and the bell mouth issue is gone. Since I do not want to size the inside of the necks because I mostly use the competition neck sizing bushing die for the 6.5x284, so I'll leave the the inside necks alone and just full size every 4th firing if needed.

Thanks for the step by step details. It's exactly what I did on all my full sizing dies to bump. I normally try to bump .002" on all my rifles except for the .001" for the 284
 
Do you have the expander button in the Full length die? The button could be causing the problem.
Well you answered your own question and solved the problem before I could post.
Good job.
 
TackDriver284":3gjw4zzz said:
mjcmichigan":3gjw4zzz said:
Well. I'm with you. Something is not right. So verify everything.
Bullet checked on a mic? Wall thickness on case. Is the die in too deep? (Same logic as the case being too long. Bumping the neck..

Will be interested in the resolution.


Sent from my iPad using Tapatalk

I checked my 6.5 x 284 fired case headspace in the bell mouthed cases and its .001" less than a fired case. It's the way I like it and as for case length and trim is just the right length. I checked my 6.5 x 284 Redding full sizing die on why the mouths of the loaded case has a .002" bell on it. Took the die apart and found that it has the grey expander button that comes assembled with the die and took it off and put the little black button that comes with your die set in a little plastic bag which does not touch the inside of the necks at all. I believe it is this : https://www.midwayusa.com/product/12733 ... n-kit-65mm
Resized and the bell mouth issue is gone. Since I do not want to size the inside of the necks because I mostly use the competition neck sizing bushing die for the 6.5x284, so I'll leave the the inside necks alone and just full size every 4th firing if needed.

Thanks for the step by step details. It's exactly what I did on all my full sizing dies to bump. I normally try to bump .002" on all my rifles except for the .001" for the 284


I really like how consistently you get on what works for your guns!


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truck driver":db2kuk4m said:
Do you have the expander button in the Full length die? The button could be causing the problem.
Well you answered your own question and solved the problem before I could post.
Good job.

Yes, it was the problem. Thanks TD and MJ. (y)
 
Anytime, if you should call Redding and tell them the problem your having with that product they will probably replace it free of charge. They have great customer service and like seeing their customers happy.
 
truck driver":3el1k796 said:
Anytime, if you should call Redding and tell them the problem your having with that product they will probably replace it free of charge. They have great customer service and like seeing their customers happy.
That is true about customer service. I told them I lost the decapping pin and I asked for one and they sent me one plus two spares free of charge. When I was confused about setting up a die long ago, they helped me step by step while i was on the press. (y) I will give them a call and see what they say. Thanks
 
Great shooting and thank you for sharing. I really need to buy a F.A.R.T. one of these days...
 
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