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Another bullet seating question...

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/05/2012 at 22:32
jason miller View Drop Down
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I fired off my first few batches of hand loads the other day with good results. Now I would like to load up some 95 grain bergers for my .243. The problem is that to seat them out far enough to get that long ogive close to the lands, I would only have about half of the inside of the neck in contact with the bullet shank. So I presume I need to either hope they shoot well from pretty far from the lands, or guess how deep to seat them and try to get closer to the lands. Any suggestions?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/05/2012 at 22:40
jason miller View Drop Down
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If it helps, they touch the lands at 2.823, but I would need to seat them at about 2.75ish to get a full grip with the neck and bullet shank. Would you guys seat them for ideal grip with the neck, ideal depth in regards to the lands, or a compromise in between? Remember, a .243 has a fairly short neck to begin with.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/05/2012 at 22:56
sakomato View Drop Down
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Since the 243 only has a .240" neck
 
 
and the rule is to seat at least one caliber deep into neck, you should seat to where the base of the bullet bearing surface (top of the boat tail) is at the neck/shoulder junction
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/05/2012 at 23:19
jason miller View Drop Down
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Well then I guess I hope they shoot worth a darn at 70 thousandths off the lands...
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/05/2012 at 23:52
jason miller View Drop Down
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Also- I have a chronograph that has always given consistent and predictable readings- from my 185 fps recurve, to 55 grain ballistic tips over 3800. Factory loads always shoot about where they should- including a few fouling shots with factory ammo right before my handloads. But my best grouping loads all shot substantially hotter than they were supposed to. For example: my problem .338 has always shot federal 225 accubonds right at the published 2800 fps, but groups 4-6". It has an extremely long throat, so I seated the same 225 accubonds at magazine maximum 3.475", and loaded 9 charges up to a half grain over book max with h4350. The 5 heaviest charges stacked into one big vertical hole just over an inch. The velocities were 2917-2996 fps though. Factory ammo went 2789, 2811, and 2816 about 10 minutes before that. Do I really load them at least 100 fps faster to take advantage of the newfound accuracy? Is the incredibly long seating depth effectively increasing powder capacity? None of the loads showed funky primers, and the bolt never got hard to lift...
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/06/2012 at 04:33
rjtfroggy View Drop Down
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  Doesn't Berger recomend starting at 0.100 off the lands for thier bullets.
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