Author Topic: 6 mm rem round nose  (Read 934 times)

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Offline 351 power

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6 mm rem round nose
« on: May 14, 2008, 02:56:26 PM »
i wanted to try the 100g hornady rnd nose bullets. built them up with the same OAL as the sp loads. they don't feed well from the magazine. will shortening the length help? how much would i dare go? if this is unsafe, no big deal. i'll just load the same way and use them at the range for practice/fun. on the bright side, the 100g sp loads were perfect. 4 of 6 shots from two groups were all touching. this rifle makes me smile
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Offline jhalcott

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Re: 6 mm rem round nose
« Reply #1 on: May 14, 2008, 05:06:53 PM »
  What do you mean by "don't feed well"? Every bullet has it's own sweet spot. Your bullet should be a few thousandths off the lands. Any where from 0.010 to 0.030" If you are jamming the round nose into the rifling ,you are raising chamber pressures. Maybe to an unsafe level ! I hope you did NOT just swap bullets when BUILDING this ammo. THAT could also cause pressures to rise. Use an EMPTY case and begin inserting a bullet into it. Try to close the action GENTLY.If it does NOT close easily,seat the bullet a little deeper. Continue doing this till the action closes easily. MEASURE and RECORD THIS length. Back off another 10 to 20 thousandths for SAFETY.
  NOW you are ready to work up a load for this bullet in this gun!  Be safe and well.

Offline 351 power

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Re: 6 mm rem round nose
« Reply #2 on: May 15, 2008, 11:56:09 PM »
no. it jams on the way into the chamber. from the magazine. closes easily on a round in the chamber
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Offline stimpylu32

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Re: 6 mm rem round nose
« Reply #3 on: May 16, 2008, 12:24:03 AM »
351 power

How much of the bullet is in the case neck now ? with the RN the ogive is in a diffrent place from were it is on say a pointed Spitzer style bullet .

You can seat the RN deeper but you will have to back off the powder charge some , how much will depend on how deep you have to seat the bullet .

stimpy
Deceased June 17, 2015


:D If i can,t stop it with 6 it can,t be stopped

Offline beemanbeme

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Re: 6 mm rem round nose
« Reply #4 on: May 16, 2008, 03:10:41 AM »
Seat your bullet a little deeper.  How much deeper??  :D  Wahl, give the seater die about a half crank down and see how that feeds.  If no better, give it another half crank. And so forth.  If your powder load is in the 85 to 90% of max, once I had my "feeds nicely" length set, I'd shoot a round or two and look at them.  If they look good, you're good to go. 

Offline huntswithdogs

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Re: 6 mm rem round nose
« Reply #5 on: May 16, 2008, 05:23:14 AM »
351,

I load these for my 243(Mauser Actioned) and my Brotherinlaw loads them for his 700 ADL. Niether rifle has had any problems feeding. If you use the COL listed by Hornady, it'll put the casemouth right at the cannelure on the bullets. I tried some of these out of my wife and younguns Brownings and they wouldn't feed from the mags. No amount of messing would get them to feed right. Single shot though, both rifles stayed inside of 1-1.5''.


HWD

Offline jhalcott

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Re: 6 mm rem round nose
« Reply #6 on: May 16, 2008, 09:42:27 AM »
  Sounds like the nose of the bullet is hanging up on the side of the chamber. ASSUMING the chamber is smooth and your COL is 2.82 " you can Use an empty ,bulleted case or 2 to see IF shortening the round will allow smooth feeding. SOME times a mag will feed from one side better than the other. Use several cases to test this out,best done BEFORE the hunting trip! It seems as if the ENTRY angle of the round is wrong to ME. MAYBE a shorter one will fit YOUR gun. Be aware of the change in pressure you can create by doing this.  If nothing else works you can sell or swap them for bullets that do work.

Offline 351 power

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Re: 6 mm rem round nose
« Reply #7 on: May 17, 2008, 02:19:41 AM »
yes, it's the left side that hangs up. my COL is 2.775" and it's a rem 700 action. i'm using a starting load of h4831.
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Offline beemanbeme

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Re: 6 mm rem round nose
« Reply #8 on: May 17, 2008, 05:27:02 PM »
Good idea to use several empty, bulleted cases.  You might want to start out a little longer than originally to see if possibly that is the problem and then work your way shorter.

With your powder load, you haven't any worries about over pressure. Using H4831, I think it'd be hard to get an over load in the case.

Offline jhalcott

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Re: 6 mm rem round nose
« Reply #9 on: May 17, 2008, 05:44:38 PM »
  I've had the same problem with a Ruger not feeding from both sides. Frustrating  is about all I can say. You can go all the way out to 2.827"COL with that bullet. It MAY be a simple problem with the magazine lips causing the problem. OR a loose boltcausing the jam. It's hard to tell with out actually SEEING the gun. A call to Remington MAY be in order.

Offline beemanbeme

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Re: 6 mm rem round nose
« Reply #10 on: May 18, 2008, 06:13:11 AM »
When the magazine is in place in the rifle, are the lips of the magazine narrower than the feed ramp into the chamber?  And is it centered? Does it look like it needs to be opened up a bit?  Or beveled a bit?  What part of the cartridge is catching?  Does it happen when you cycle the action slowly? Or fast? Or all the time? 
As you can see, this has gotten me interested.  I've several 700's that I use RN bullets interchangeabley with spitzers and have never had a problem so....................??
And FWIW, when I change bullet profiles, I don't rework my powder charge.  Just adjust my sights if needed.  But then, I don't motor my rifles at top end as a rule.

Offline jhalcott

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Re: 6 mm rem round nose
« Reply #11 on: May 22, 2008, 03:42:35 PM »
  This does SOUND like the mag is pinching the follower a bit. Try to work several rounds (empty bulleted) thru the action . First push them firmly to the rear as you load them into the mag. Then just push them in so they are in the mag SOMEwhere. If they chamber from the rear most position your mag MAY be pinched during reassembly. Make SURE the follower isn't sliding around in the grooves for the springs. This is a known problem with the 700 action of later manufacture. Quality isn't always the best. The mag should NOT be so tight in the wood it is crimped.

Offline 351 power

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Re: 6 mm rem round nose
« Reply #12 on: June 04, 2008, 05:51:58 PM »
been busy planting for awhile guys and didn't reply. haven't even had a chance to get to the range in too long. this is a blind mag adl model. the bullet nose hangs up at the chamber mouth. fast or slow. and only from the left side. so that sounds like the mag opening. but it's perfect with the pointed bullets. think i'll try the powderless bullet and gradually shorten it. beemanbeme, i'm actually using 42.8 g of that h4831. now IMR has a col of 2.735". would that be an absolute minimum that only applies to their powder?
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Offline jhalcott

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Re: 6 mm rem round nose
« Reply #13 on: June 04, 2008, 06:42:35 PM »
that length MAY be a compromise of the bullets they are using. like 70.80 and 100 grains. Try to measure the total length of the cartridge/chamber. Drop a bullet into the chamber and hold it at its deepest position with a cleaning rod. Run another rod down the muzzle till it contacts the bullet.Carefully mark the rod where it exits the muzzle.Use a sharp knife for this mark. Remove the bullet and close the bolt. Run the rod down the bore till it contacts the bolt face and carefully mark this point. Now with a good micrometer or caliper measure the distance between those marks. This is the LONGEST LOADED round you can chamber in the gun. Try a bulleted case at this OAL. If it fits try a slightly LONGER one. Once you have the longest dimension , you can start shortening them to see if it helps. The minimum charge given by powder companies is the one they found to give no problems INTHE BARREL/ACTION they were using at that time. I try to use as many manuals as possible to get a start and MAX load. I hope I haven't confused you with all this.!

Offline Sweet 6.5

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Re: 6 mm rem round nose
« Reply #14 on: June 04, 2008, 07:10:44 PM »
 Hi

I have the same problem with 160gr RN Hornady in my Swede. I also have no problem from
the right hand side. If I just put one round in the magazine it sits on the right and right side.
So once in the field I put one in the magazine and with my hand put one in the chamber.

Then I do my best to shoot straight and hope and pray I don't need a third shot!!
;D

Cheers
Sweet