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#3178836 - 02/28/13 06:56 AM Re: Another 300 WSM Quest [Re: ewc]
Jcalder
6 Point


Registered: 09/18/12
Posts: 981
Loc: Tennesse

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I'm not sure what you're referring to as mag length and max length, but I know I'm not on the lands. Oal according to sierra is 2.750. Not sure if thats min or max. But I seat my bullet until I can close my bolt without it getting in a bind. I also look at the bullet and see it the lands make any marks.
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#3178962 - 02/28/13 08:38 AM Re: Another 300 WSM Quest [Re: Jcalder]
gtk Moderator
8 Point


Registered: 01/26/01
Posts: 2497
Loc: Mississippi

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Both of my reloading manuals say do "NOT" touch the lands, because increased pressure can occur?

My manual says max OAL is 2.860. I started my dummy load out there, and couldn't even begin to shut the bolt. I kept slowly seating it deeper until I could close the bolt with no "sticky" feel.

Then I put magic-maker on the bullet and chambered the round, and it left a noticeable ring. So I seated it deeper in .001 increments until it left no ring.

The OAL ended up being just what Barnes publised @ 2.820
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#3178976 - 02/28/13 08:48 AM Re: Another 300 WSM Quest [Re: gtk]
Jcalder
6 Point


Registered: 09/18/12
Posts: 981
Loc: Tennesse

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It's possible my manual states the minimum oal. But the way you done it gtk is similar to what I do to seat my bullets. Without doing the marker trick
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#3179052 - 02/28/13 09:54 AM Re: Another 300 WSM Quest [Re: Model70Man]
gtk Moderator
8 Point


Registered: 01/26/01
Posts: 2497
Loc: Mississippi

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 Originally Posted By: Model70Man
I have found with shooting Barnes bullets that seating the bullets just off of the lands is not very good for accuracy.

I did some more reading on this, and the consensus on the interweb agrees (and if its on the internet, it must be true) \:\) . Everyone thinks its something to do with Barnes bullets being so hard & seating further off the lands allows it to build up more pressure.


Just how far are you seating off the lands?
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#3179140 - 02/28/13 10:53 AM Re: Another 300 WSM Quest [Re: gtk]
MUP
Non-Typical


Registered: 08/01/07
Posts: 43875
Loc: Just North of Chatt-town

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Crap, now I'm confused...I thought that not having some distance between bullet and lands was what would increase pressure?
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#3179352 - 02/28/13 02:37 PM Re: Another 300 WSM Quest [Re: MUP]
Hunter 257W
10 Point


Registered: 10/04/12
Posts: 2944
Loc: Franklin County

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If all else is the same(i.e. case, primer, powder) you will get higher pressure if you seat a bullet against the rifling than if you seat it a bit deeper.

That's why if you are going to seat the bullet against the rifling, you should start load development with the bullet against the rifling. Never work up a MAX load with the bullet seated deeper and then seat it out further to touch the rifling. I like to work up in 1 grain increments looking at primers and feeling for an increase in bolt lift force required to extract the case. When you find iether of these back off a grain. If you are working up the load in cold weather to use in hot weather you might want to back off 2 grains.

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#3179358 - 02/28/13 02:40 PM Re: Another 300 WSM Quest [Re: Hunter 257W]
Hunter 257W
10 Point


Registered: 10/04/12
Posts: 2944
Loc: Franklin County

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Of course this assumes you are loading for a bolt action rifle that operates at high enough pressures for primers to flatten and obviously you get no feed back on extraction force with other action types. With lesser pressure cartridges/guns, I go conservative as living through the experience with all my fingers trumps another 100 fps. \:\)
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#3179398 - 02/28/13 03:19 PM Re: Another 300 WSM Quest [Re: Hunter 257W]
gtk Moderator
8 Point


Registered: 01/26/01
Posts: 2497
Loc: Mississippi

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 Originally Posted By: Hunter 257W
With lesser pressure cartridges/guns, I go conservative as living through the experience with all my fingers trumps another 100 fps. \:\)

that is my goal. I would like to keep all my extremities !
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#3179452 - 02/28/13 04:08 PM Re: Another 300 WSM Quest [Re: gtk]
Hunter 257W
10 Point


Registered: 10/04/12
Posts: 2944
Loc: Franklin County

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 Originally Posted By: gtk
 Originally Posted By: Hunter 257W
With lesser pressure cartridges/guns, I go conservative as living through the experience with all my fingers trumps another 100 fps. \:\)

that is my goal. I would like to keep all my extremities !


And considering that you are going on an Elk hunt, which I assume if you are like me, is not something you get to do often(I've never been) - I'd stay relatively conservative with pressures so you don't have to worry about getting a case stuck in the chamber 1,000 miles from home an a hunt of a lifetime. Same for seating bullets into the rifling. It's very unlikey to happen but it would be my luck to have a bullet jam into the rifling and pull it from the case while unloading the rifle on a special hunt like that. I'd still want good accuracy but an elk is a big animal. 1 1/4 groups should be easy to get and plenty good enough. I get aggravated at myself for ever deviating from my old 25-06 load with 115gr Nosler Partitions. It killed faster than any other load I've used on average but I stopped using it just because I couldn't get that magical 1 moa. It would shoot 1 1/4 - 1 5/16" consistently and kill any deer I shot at though if I could just forget that extra 1/4" spread at 100yds. I guess the Varmint hunter in me is to blame for that.


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#3179878 - 02/28/13 11:21 PM Re: Another 300 WSM Quest [Re: Hunter 257W]
skynimrod
10 Point


Registered: 11/10/06
Posts: 2543
Loc: Bellevue Tn

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Reloading, and Elk hunting I go for accuracy not speed. In fact I'm very happy when I'm not pushing the envelope & find my sweet spot in the middle range load ups. I load 5 rounds in .5 grain increments starting from the bottom of my hottest list book, I have several & working up for accuracy, and the max for notes if I reach it. I will go 1 grain over my highest list. I go just a hair off the lands most of the time.

I killed a bull elk at over 400 yds with a 1 shot drop using my most accurate load for that gun at the time. I needed it & had time to load it. Believe it or not it was a Nosler ballistic tip 150 gr 7mm Mag with H870 smoking hot, but it had time to slow down a little for a bang flop. I carried partitions usually for close work with that rifle.


Edited by skynimrod (02/28/13 11:23 PM)
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