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338 edge loaded to the lands.

 
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  #1  
Old 01-04-2012, 11:58 AM
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338 edge loaded to the lands.

Hi everyone, I just shot a great group at 200 yards the other day. With 300 grain bergers loaded to the lands. 92 grains h1000, I know this creates more pressure. I had none of the easy pressure signs like heavy bolt lift creatored primer, or power residue around primer. I guess my question is if I work up say half grain at a time is it theasable. That my es and SD will lower as my case fill is increased? Just trying to save myself more work. The group was so great I wana say Iam done with load development. But I guess I have more work to to by checking SD and es and if there high to see if I can lower them. Will SD and es lower at Max load or no really so? Thanks for the advice.
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Old 01-04-2012, 12:21 PM
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Re: 338 edge loaded to the lands.

I don't know what you are seeing for ES, but remember that Chronographs can be fincky and fib to ya. Your load is in the ball park of max. Most .338 edges I have worked with will see pressure at 92.5 or 93 grains with 300's. These loads have proved to make for short brass life with the rifles I worked with using RP brass.

How about this? Take your rifle out and shoot a few 3 shot groups at 800 or 1000 yards with this new load you have. Then measure your actual verticle spread. Tape measures don't lie.

Jeff -------------------------------------------------------------------------------------------------------
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Old 01-04-2012, 06:01 PM
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Re: 338 edge loaded to the lands.

Hey thanks for the idea. That is what Iam going to do what should I expect for verticle spread if do have a good load. ?
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Old 01-04-2012, 06:05 PM
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Re: 338 edge loaded to the lands.

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Originally Posted by timmyatnop View Post
Hey thanks for the idea. That is what Iam going to do what should I expect for verticle spread if do have a good load. ?

I like to see 1/2 moa or less. But if the group is better vertical than hozontal it is an indication of wind and not load. I feel your groups should be shorter in vert. than width at distance. Shoot 3 and let her cool completely while you go look. Then shoot 3 more to form a 6 shot grp.

Jeff
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Old 01-04-2012, 07:48 PM
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Re: 338 edge loaded to the lands.

OK that sounds great, ill get ir done this weekend. If the wind doesn't blow a gale. Thank you for the help much appreciated. I know I shouldn't get to excited to yet but my group at 200 was the best group I've ever shot with this rifle. Well with any rifle.
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Old 01-04-2012, 08:13 PM
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Re: 338 edge loaded to the lands.

I'm not going to disagree with Broz but the typical load he speaks of with 92-93grns being max is usually at 3.775"-3.8" oal with bergers on the lands you should be over 3.9" that leaves alott of empty space, that said, Kirby Allen is right with the edge design and bergers on the lands at close to a 4" oal Retumbo is a better choice for charge density and velocity without giving up virtually anything else to H1000.
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Old 01-04-2012, 08:33 PM
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Re: 338 edge loaded to the lands.

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Originally Posted by backwoods83 View Post
I'm not going to disagree with Broz but the typical load he speaks of with 92-93grns being max is usually at 3.775"-3.8" oal with bergers on the lands you should be over 3.9" that leaves alott of empty space, that said, Kirby Allen is right with the edge design and bergers on the lands at close to a 4" oal Retumbo is a better choice for charge density and velocity without giving up virtually anything else to H1000.
This is true that case volume from bullets seated out farther can reduce pressure and leave a little room. But it kinda depends on the throat length of the reamer, doesn't it?

I have only loaded for and worked up loads for about 3 different .338 Edges, but they all were showing pressure by 93 gr one was done at 92 and this was at 4100' of altitude in 60 to 80 degrees ambient temps. I feel at any of these charges with 300 gr bullets you need to progress with caution and back way off when starting a new lot of powder.

Jeff
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