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I recently purchased a Ruger No 1 in 6mm Remington. After I got it home I took it to the range with some FACTORY Winchester Super X loaded with 80 gr. bullets. The accuracy was ok but had one problem. A moderately flattened primer and pronounced offset ring all the way around the cartridge at its base. the ring is NOT perfectly uniform either. The offset is more pronounced on one side of the cartridge. There is no black smoke around the primer and the firing pin hole is not cratered or pierced. Also this is my first No 1 Ruger so when a cartridge is chambered should you be able to see the top part of the rim on the case?? My GUT feeling is that this is an obvious sign that the rifle has been over loaded at some point in time damaging the chamber?? I contacted the person I purchased it from and he claims this is perfectly normal because this is a high pressure round and that his brass fired frome the rifle is in the same shape. To be fair to him he is claiming that the rifle was always like this as he purchased it from another individual. I The rifle dates back to 1972 so it could have had MANY owners over last 33 years. I am going to take it too a gunsmith to have chamber measured and rifle checked out ASAP. | ||
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I'd take the time to ship it to Ruger and have them check it out. I've heard good things about how they stand behind their product. However---How many rounds looked this way? 1 or all? The shells slide all the way in the chamber on my Browning Falling Block--unless I've resized them wrong or seated the bullet into the lands. Your shooting factory shells and I would think they'd slide all the way in too----unless the chamber has some form of build up inside. Not that I'm an expert but these signs of yours don't say overload to me, not that I can say what the problem is. This type of action is so strong and they lock the shell so postive in the chamber that if the rifle was damaged by an overload more than this would be obvious. I think I'd super clean the chamber and barrel, oil it up lightly, try a few more rounds throught it, and if the problems persist, send it to Ruger. | |||
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Yes they all had flattened primer and offset pressure ring some were a little more pronounced than others. I am going to try some Federal factory ammmo and contact Ruger rep in Canada to where I can send it in to get it checked over and tested... | |||
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Cory, Please let us know how this turns out. I have a Number 1 also, but haven't had any pressure problems. Something is dead wrong with your rifle. Maybe the Ruger Rep can contact someone at Ruger to shorten up the time to get it fixed. Good luck, Don | |||
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Thanks to "Paul B" for a very good reply. | |||
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I'd say something is wrong... Doesn't sound right to me. Perhaps the headspacing is excessive at the breech? Send it back, the couple weeks it takes will be well worth the peace of mind. PS: The 6mm Rem is a fine round. .22 LR Ruger M77/22 30-06 Ruger M77/MkII .375 H&H Ruger RSM | |||
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Thanks Paul B, GREAT informative post. This comfirms what some others have told me, and what the guy I got it from said too. This is my first 6mm and my first Ruger #1 so I am a little in the dark and also first time I seen a flattened primer from factory ammunition. The rifle is in VERY good condition with only a few marks on the wood and bluing is pretty much all intact. It dates back to 1972 with serial number search so I got lucky. A year later and it would have had a Wilson barrel. It has 26 inch barrel(Douglass premium I am pretty sure) and has Boss CR installed and previous owner said he could get 1/2 groups at 200 yards with it. If I get a chance I will post some pics of rifle and fired casings... Also, I dropped an email to Ruger repair reps in Canada. If they think there is a problem I will send it in to them and have it checked over. Thnx to all that replied. | |||
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I doubt there is anything worng with your rifle. As the doctor wrote WBNM, well baby nervous mother. The 6mm is a high pressure round and will produce this condition if the chamber is larger than the minimum size. I have found that once fired 6mm Rem (and 25/06) brass is the worst about having blown primers with factory ammo. You can check the rear diameter of the chamber with a small hole gage or gauge pins and compare it to the SAAMI spec. It it looks to be oversize you can send it back. If not you might find some brass with a larger head diameter. It only has to be .002 to .003 larger to make a significant. | |||
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Would one be better off to full length re-size or leave cases expanded and neck size only. This rifle will be for target shooting and varmiting mainly. May used it for odd deer hunt I usaually bow hunt for big game. Fired brass chambers and extracts with ease. My concern is over working the brass in this area by full length re-sizing. | |||
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I would partial size with a FL sizer, however I can't recommend Lyman for this since their dies do squeeze the body down more than most. Most standard sizers will not squeeze the case head back to factory size so you will not be sizing it as much as you think. You could borrow a .243 FL sizer and try neck sizing with it. Just remember size the neck only. If you adjust the .243 die too close to the shell holder you will create excess headspace on you 6MM brass which is very bad and dangerous. You might try Remington brass. It is sometimes a little thicker and doe not show such a sharp bulge. | |||
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What about using 7x57 Norma Brass and forming it the same way one would form 6mm Remington Ackley Improved ... The base of the 7x57 is only a few thousands larger than base of 6mm remington and the rim is exact same measurement. This may give me a perfect fit. This would be a pain cause I would have to turn necks...which i have never done before?? I will take things slow do lots of research and hopefully not lose any digits in the process... | |||
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Just mounted Simmons 6.5x20 44 Mag scope today.(premium optics) Took it to the range. VERY cold and fairly windy so probably could have done better. Winchester factory Super X 80gr. 3 groups under 1 inch at 100 Yards.(best one was .830) 2 groups at 200 yards were right around 2 inchs. I know by benchrest standards this is not very good but it is a good start for me. This was never intended as a benchrest rifle but is going to be a varmint and occasional deer hunting rifle. Handloads with premium bullets should shrink these groups which for a Ruger No. 1 will suit me just fine thanx. | |||
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Don't use the book data for case head diameters without measuring the actual brass. You might find that Remington brass is slightly larger and thicker producing less of a step. In addition you can also look at .257 Roberts brass. I doubt that you would have to neck turn formed brass. To be sure measure, the neck diameter of you chamber with gage pins of make a chamber casting. In the mean time if you can't stand that "sorry" shooting 6MM just ship it to me. I will give the poor thing a home.  | |||
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Cory. you don't need a premium bullet to get good groups. Just shoot Sierras. Cheaper and asa ccurate a standard bullet as you'll ever find. Paul B. | |||
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BULL! If anything is wrong, it is more than likely a problem with the ammo, not the rifle! However, please note that flattened primers don't necessarily mean that pressures are too high! And yes, when the No. 1 action is locked shut, you CAN see the top edge of the cartridge rim...... "Bitte, trinks du nicht das Wasser. Dahin haben die Kuhen gesheissen." | |||
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Here is pic of shell casings...  | |||
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I bet it's a headspace problem. I had a ruger m-77 in 220 swift that did the same thing. Had a gunsmith set the barrel back a bit and problem went away. If that is the problem, ruger will fix it for free I bet. deadeyejehlen | |||
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Corey. your pictures confirm what I thought was the problem. You have a chamber on the large side. That doesn't mean a headspacing problem, just that the chamber is slightly oversize at the rear.Just set you sizing die to partially size and you should not have any problems. One of my #1s in .300 Win. mag. does the same thing and the 100 rounds of Federal brass that I bought as factory ammo for it alost 30 years ago has been loaded about ten times and is still going strong, and take my word for it, I load them hot. A 200 gr. bullet at 2950 FPS. Paul B. | |||
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Hi, In my 7x57 the spent cases differed according to manufacturer. PMC showed a bulge as in the pictures above, Highland; which are to manufactured European CIP standard, did not. I measured unfired cases and yes the Highland's were closer to CIP specs. Unfortunately the Highland rims are to CIP specs too which means it will not fit into a 30-06 size shell holder but the PMC ones will. The shell holder differences are simular with 6.5x55 cases. Remington are fine in the 30-06 holder some European ones just won't fit. S&B come to mind. Since the 6 mms' parent case is the 7x57 it does not surprise to read of this problem. Ho Hum. | |||
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This is also the impression I get from looking at your picture. I have a number of rifles that leave cases looking pretty much the same as yours, and there's nothing wrong with any of them. "Bitte, trinks du nicht das Wasser. Dahin haben die Kuhen gesheissen." | |||
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cory006, I concur with the consensus of the pictures that your chamber appears on the large size. I would partial F.L. size as recommended if it were mine. You didn't show a picture of the primers but the web (pressure ring) looks OK from what you can see in the picture. It doesn't appear to have an abrupt start to it that can signal higher pressures. It is normal in a #1 to see some rim protrude from the chamber. (i.e. the breechblock doesn't close tight against the barrel tenon face.) BigRx | |||
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Do you know the dimensions of your chamber?? You mentioned that you have a custom barrel on your #1. It may be that even with factory ammo that the bullet you are shooting is already touching the lands. I have a #1 in .243 and the standard Ruger chamber is a good deal shorter than the max COL for .243 ammo! I discovered that by getting some seriously overpressured brass from a few rounds of standard COL ammo. | |||
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No dimensions yet but I have been in touch with a couple of smiths to arrange a cast. It is Original factory barrel, but at that time Ruger outsourced their barrel production to DOUGLASS. I checked the overall length and 80 gr bullets do not even come close to the lands..I could go WAY over max cartridge length if I like... I think I will try some neck sizing in the interm...then get chamber cast done and decide what to do from there... Either set barrel back and re-chamber or get new custom barrel. | |||
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Do you mean the Douglas Barrel outfit in W.VA.?? They make excellent barrels! Here's five shots @ 100 yards from a Douglas Premium Grade in 6mm/284...  "Bitte, trinks du nicht das Wasser. Dahin haben die Kuhen gesheissen." | |||
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Pretty sure it is one and the same. I believe all Ruger No 1's up until 1973 had premium Douglas barrels. from 1973 on they went to Wilson barrels and thats where they started having problems... | |||
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Cory. They sure as hell weren't premium barrels, not at the $10 apiece Ruger paid for them. I was fortunate in only getting one really bad barrel on a #1A in 7x57 Mauser. Damn thing had a rwo inch lonf throat as determined by a chamber cast. I notified Ruger. They said to send it in, and after about a four month wait, I got it back with a whole new barrel. I gues I'll just have to repeat myself, but I think your barrel is just fine. Paul B. | |||
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Youch...I thought they were "GOOD" barrels??? I think some would disagree with you on that fact. Mine gets such good accuracy I will not touch it for the time being...guess I won't be looking for anymore from that era. LOL This is my first Ruger No 1 and I still LOVE the rifle and the caliber. If I can get 3/4 inch groups at 100 yards with factory ammo it will make a FINE varmint and deer rifle... | |||
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I have a couple of #1s. Here's a case fro the 22/250 that has been fired about 5 times. It shows an expansion ring also. but since then I have reloaded it 4 more times. I do sized oly the neck using a FL die. Accuracy is OK for a #1 (I'm spoiled by my CZ)  Back to the still. Spelling, I don't need no stinkin spelling The older I get, the better I was. | |||
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Did up some handloads: Rem Brass 44 gr of RL-22 CCI-200 Nosler Ballistic Silver Tip(95gr) 2 groups had a couple spoilers in them, 3rd group is the best... http://www.hunt101.com/img/293933.jpg Cases also look alot better with Remington brass as well....  | |||
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Cory! This is how your "problematic" No. 1 shoots?? Damn good rifle!! "Bitte, trinks du nicht das Wasser. Dahin haben die Kuhen gesheissen." | |||
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Cory. Murphy's Second Law: "IF IT AIN'T BROKE, DON'T FIX IT." That rifle ain't broke.  Paul B. | |||
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I hope as I increase the powder charge it shrinks the groups even more...  | |||
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I seriously doubt that there is anything wrong with your rifle or that your chamber is particularly "oversize". Your chamber may be at maximum of SAAMI specs, but that is not a bad thing per se. Actually, it may be a good thing, as it also means your rifle will probably chamber & safely fire any factory 6 m/m Remington ammo from any maker on earth. What I DO suspect is that the ammo you got is of minimum SAAMI spec....i.e., small enough dimensions to fit in any factory chamber of that name, from any large production gun maker in the world. That's why SAAMI specs exist, to make sure all the factory ammo will work in all the factory chambers. It does mean that whenever you shoot minimum size ammo in maximum size chambers, you can get some less than beautiful fire-formed hulls. My country gal's just a moonshiner's daughter, but I love her still. | |||
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