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This is how much Bullet sticks out to touch the lands,.is this ok?

Discussion in 'Handloading and Reloading' started by hc1, May 11, 2009.

  1. hc1

    hc1 Member

    The gun is a Remington 700 7mm remington magnum.I am Using an OAL gauge. The picture shows how far the bullet is out of the case to touch the lands. Have only shot loads that are very close to factory loads, OAL.
    Just concern about that much bullet out of the case. This will be target loads, so loading them one at a time is ok.
    Thinking maybe back off about 0.050 and start there, what do you think.

    Attached Files:

  2. jbkebert

    jbkebert Well-Known Member


    The bullets you are using have a cannular ring on them. That ring is for the crimp. Or i guess in other words they are made to be seated at that point. If you are going to seat off the lands select a bullet without that ring. Also it seems as though they stick out pretty far. The picture above is of two .308 win rounds. The one on the left is a 165 grain InterBond factory seated at the cannular ring. The one on the right is a 168 grain A-max seated to .010 off of the lands. This is only one load for one rifle and there are tons of possibilties. I would be afraid that from the looks of your photo that you are too long overall. I could be wrong, I would also be afraid that you will have alot of trouble getting those shells to cycle through a magazine be it internal or box style. When I make up a load with a OAL gauge I take a measurement and write it down. I completly screw up the gauge and then take a new measurement. I do this 4 to 5 times to make darn sure I keep coming up with the same thing. Then depending on the make up of the rifle. I make one group of shells at .010 off the lands, another group at .012 and then .015.
  3. NCsmitty

    NCsmitty Well-Known Member

    If that is an actual to-land dummy round, then I would seat the bullet .020 deeper and try. This is the numbers that I use when setting my COAL.

    You need not worry about the cannelure. You just need to determine if it fits the magazine if you are not shooting single shot.

    Last edited: May 11, 2009
  4. rcmodel

    rcmodel Member in memoriam

    IMO: Using all the case neck to provide better case neck tension (to get consistent powder burn) will do more for accuracy then seating to such extreme lengths.

    At some point, you will reach a point of diminishing returns, and it looks like you might already be there.

    Unfortunately, todays rifles are coming with ever longer free-bore, or long leades in order to reduce pressure, and limit liability. It's a lawyer induced "Improvement" to todays rifles that makes me question whether we have almost reached a point of making "seating to the rifling" impossible, or at least impractical.

    On the otherhand, Weatherby invented excessively long free-bore 60 years ago, and some of them shoot incredibly well with normal factory load seating length.
    As will your Remington 700 if you find the right bullet & powder charge.

  5. Master Blaster

    Master Blaster Well-Known Member

    Are you able to close the bolt on such a long round?, Unless the throat is completely burned away from thousands of rounds being fired I would bet the bolt will not close on that round. If it does you need a new barrel because your old one is worn out.
  6. 30Cal

    30Cal Well-Known Member

    For anything other than very special purpose, I'd say it's bad. You want approx 1 caliber's worth of neck tension.
  7. USSR

    USSR Well-Known Member

    Welcome to the world of the long-throated Remingtons.:D

  8. rcmodel

    rcmodel Member in memoriam

    At least.
    But more is probably more better.

  9. hc1

    hc1 Member

    This picture is a 5 shot group at 100 yards with same bullet as in the first post of this thread, with the bullet seated at the cannular. I am still working up a good load. Haven't got to the point of adjusting my scope yet, no need in chasing bullet holes untill i get the group i am looking for.
    I record all parameters just don't have them in front of me.

    Attached Files:

  10. 243winxb

    243winxb Well-Known Member

    Seat some long like in your photo. Seat some with the full diameter(not boatail) of the body of the bullet at the neck shoulder junction. Seat some in the middle of the 2. Take you 3 different COAL ammo to the range and test. 5 shots each. Plus i feel its more important to have the round centered in the chamber. Try working on your cartridge headspace, using the shoulder of the belted 7mm.
  11. rcmodel

    rcmodel Member in memoriam

    Well, that right there looks like a pretty darn good 5-shot 100 yard group for a Rem 7mm Mag.

    Proving the point that you don't have to seat really long to get it to shoot.

  12. fireman 9731

    fireman 9731 Well-Known Member

    Yep... with a group like that I would just keep it simple and seat to the cannelure!
  13. Ol` Joe

    Ol` Joe Well-Known Member

    The std rule of thumb for seating depth is 1 caliber or more of the bullet needs to be in the case, minimum. Example; a 7mm bullet should have 0.284" of the shank in the case. This of course isn`t cut in stone.
    The big question in my mind is if the loaded cartridge will fit your magazine? To my eyes it appears it might a bit longer then the SAAMI max COL 3.290"?
  14. Ben Shepherd

    Ben Shepherd Well-Known Member

    I'll give you a 3rd on that motion.

    If that rifle is shooting that load seated to the cannelure like that out of the box with a factory barrel, and the velocity is high enough for you, run it. Especially if you can reliably duplicate it in different weather conditions.

    You'll burn a lot of slugs and powder trying to beat it.
  15. Mal H

    Mal H Administrator

    As several have said, if you're getting groups like that with "short" rounds, I think you're going to be hard pressed to improve the groups by seating so that the bullet just touches the lands.

    However, there's nothing wrong with wanting to try. That's what makes handloading fun! 243winxb gave you a good idea for a range of bullet seating experiments. Might be an eye opener if you give that a try.

    As for your original question - "Is this ok?" Yes, it is, but only if you do as you said and hand load them individually into the chamber. I doubt you would have much luck loading from the magazine anyway. But, I would be more leery of the bullet getting cocked in the case mouth with that much of a lever sticking out of the case.

    Having at least a caliber of case mouth purchase on the bullet is desirable, but not absolutely necessary. The problem is you would be carrying around some relatively fragile rounds, as far as I'm concerned.
  16. hc1

    hc1 Member

    Thanks for your replys. The rounds that was shot into the pictured target where at a max length as far as working a live round through the rifle. May try what 243winxb said just to see. I don't mind loading them one by one.
    That target was only my 5th batch of 5 shot loads.

    Bullet: Hornady 162 grain SST
    Powder: Hodgdon H 1000 61.7 Gr.
  17. lgbloader

    lgbloader Well-Known Member

    Looks like your on the right path. Just don't make it too complicated for complicated sake to try to make it better. Sometimes simple is the ticket.

  18. FlyinBryan

    FlyinBryan Well-Known Member

    keep in mind that seating to the lands can increase chamber pressure above what a given load will suggest, as well as accelerate throat erosion.
  19. Sport45

    Sport45 Well-Known Member

    I'm cornfused. You said:

    and then turned around and said:

    Does that mean that seating at the cannelure is the only way they fit in the mag well or that the group was shot with the set-long bullets in your first post? If that group was shot with the bullets seated to the cannelure and they function through your action I'd leave well enough alone. At this point you could play with crimp/no crimp (into the cannelure) or tweak the powder charge. You may have to move the target out another 100 yards or so to see the changes...
  20. hc1

    hc1 Member

    Quote from Sport45

    This picture is a 5 shot group at 100 yards with same bullet as in the first post of this thread, with the bullet seated at the cannular.

    and then turned around and said:

    The rounds that was shot into the pictured target where at a max length as far as working a live round through the rifle.

    Does that mean that seating at the cannelure is the only way they fit in the mag well . Yes, Have not shot any rounds that are any where near the length in the photo at the start of this thread.

    Sorry for the confusing

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