For those of you that have read a few of my posts concerning my 22-250 A.I. that I bought several weeks ago. another strange thing to me is the condition of all the Lapua brass and reloads I got when I bought this gun! As previously stated, it is the 22-250 A.I. in an older 700 bdl with all smith work performed by Mark Penrod. He blueprinted the action, bedded/floated the barrel/ action and chambered the Kreiger ss barrel for the 22.250 A.I. I have not yet done a chamber cast per a few recs on here! However, my question is for you guys that could guess what is going on with this rifle! All the necks of the 300 + Lapua cases have "longitudinal" grooves on the full length of the necks of all the cases! Could this be caused by "chatter" machine marks in the chamber when he did the chambering?! I see nothing inside the deluxe Redding dies that would explain these "grooves" in the necks! I have never encountered this condition in any necks in my 45+ years of reloading centerfire cartridges! Thanks, Tom
mysterious longitudinal grooves on case necks
- Thread starter tcr1146
- Start date
Dusty Stevens
Shiner
Bushing did it. Happens all the time. Try a different one if you dont like it
Does the neck have marks before you shoot them? Larry
wvlongshot
Gold $$ Contributor
If I understand correctly, all the brass you have came from the previous owner in fired state. A Lee collet die can leave the type of marks you speak of. I have a couple that do. Could be the reason.
This thread is worthless without pictures!
Not really if the neck is smooth and no scratch markets before it is fired . That will tell the story. LarryThis thread is worthless without pictures!
+1. A picture please. Thanks JCSThis thread is worthless without pictures!
Had the same problem with a Forster die, sent it back to them they polished the neck, no problem after that....the culprit was my using graphite on the necks and the scoring of the the neck from the graphite that attached or whatever to the die. Used oooo steel wool and that helped to remove the marks on the brass. No more graphite for me, Hornady One Shot and no problems
+1 I have Lapua brass in 22-250, 308, and 260. This happened on just about all of it when it was new, and sometimes right after it was annealed. I called Redding about the problem, and they said it happens with Lapua brass and bushings. It should go away after it is fired and work hardens a bit.
I had the problem with a couple of bushings. Solved it by polishing the edge where the radius/chamfer at the opening joins the ID of the bushing. Some hand work with 2,000 grit sandpaper finished the job the factory didn't.
Remove the slightly sharp edge and no more brass gets "scraped" as the neck is sizing.
Remove the slightly sharp edge and no more brass gets "scraped" as the neck is sizing.
smoooth
Gold $$ Contributor
I'm having the same issue on some 300WM cases. Had to use an older RCBS FL die as the base diameter is much tighter than the Redding. As mentioned above, the problem must be in the die neck since I am just using the RCBS die as a small base die. If I use the Redding FL die after the RCBS, the expander ball gets rid of 90-95% of the lines. I have also noticed that the expander ball can have a very poor finish and cause the lines as well.
I see the question I ask was never answers .
Till that is every thing that's said means nothing.
Does a piece of brass that the neck is un marked when shot in the gun come out un marked? That is the first and only question that needs answered. Larry
Brians356
Silver $$ Contributor
If 2000 grit solved it, any "grooves" couldn't have been very deep in your case. Doesn't sound like the same issue as the OP, but until we get more details and/or pictures we are all like mushrooms here, as he seems to have gone to ground on us.
Brians356
Silver $$ Contributor
+1 I want the answer, too.
I cannot answer that question because all of the brass/reloads had the same condition! I just now tried to do a chamber cast and boy was that a mistake! I watched four youtubes and it sure looked simple! It was until I tried to get the cast out! I could not beat it out with a two pound hammer and a stout rod! I ended up having to melt the casting out. Now, I have some material in the throat /leade etc or in the start of the rifling! So far, no luck getting it out! Will good bronze brushes and scrubbing remove the cerrosafe from the leade in?! Yep, only Tom could get this sob stuck and not be able to get the casting out!
Wow you never check the brass first.
Then you question the gunsmith. Larry
As best I could I visually inspected the chamber. It all looked fine as best I could tell. I then got the "brilliant" idea to chuck a few fired unsized cases up in a drill and using 600 automotive paper I removed all existing "grooves/'scratches'. I then ran one through the redding fl sizing die and the neck was fine. I then did the same using the neck sizing die! The grooves immediately appeared. Not trusting anything, I polished another one and ran it through the neck sizing die. Again, the grooves appreared! Although I can see nothing inside that die to explain it, I will obviously quit using that die! I also now can see how bushing dies or any type dies can cause this! Thanks guys, Tom
Lack of lube will do this. What lube are you using? Are you sure you properly lubricated your test cases?
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