Load data DOUBLE CHECK IT!

oaken
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Posts: 351

Load data DOUBLE CHECK IT! Dec 5, 2015 12:37:17 GMT via Tapatalk

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Post by oaken on Dec 5, 2015 12:37:17 GMT

DO NOT TRUST YOUR (LEE) RELOADING MANUAL.
Always cross reference any data!
Spot the mistake? Max loads are ringed.
i281.photobucket.com/albums/kk203/oaken488/8613DB28-415F-4587-902C-3FB5880C8BD1.jpg
This 87gr maximum load with n160 is dangerous by about 2.5gr!
I did the first phase of load development on my .243 with .3gr increments to find where pressure signs begin to show. 44.5gr needed brute force to lift the bolt and left a large slice of brass in the extractor recess!!!
I have been known to make up a few rounds with 1.5gr under the listed maximum if unable to get my regular powder. Would have been interesting with this load.....
Shoot next to me at your peril, I use a lee manual!

davet stalker Posts: 385	Load data DOUBLE CHECK IT! Dec 5, 2015 21:43:31 GMT Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by davet on Dec 5, 2015 21:43:31 GMT For 87g read 47g? !!!

c18rch
senior member

Posts: 510

Load data DOUBLE CHECK IT! Dec 5, 2015 22:48:00 GMT via mobile

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Post by c18rch on Dec 5, 2015 22:48:00 GMT

87gr bullet.

Admittedly that load data seems a bit odd, but my load with the 87gr V-Maxes was 45.5gr, so maybe there is something else contributing to your problems.

Mine was 45.5gr with sako cases or 45gr with lap cases of vit 160
CCI or Fedral primers (made no difference which)
Can't remember length, but it was mag length of a remmy 700 mag.

The load was on the hot side (3250 fps) but no pressure signs

Last Edit: Dec 5, 2015 22:49:08 GMT by c18rch

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oaken
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Posts: 351

Load data DOUBLE CHECK IT! Dec 6, 2015 9:23:16 GMT via Tapatalk

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Post by oaken on Dec 6, 2015 9:23:16 GMT

Blimey Dave, how long do your cases last?
Not aware of anything wrong at my end. Mag fed 45thou jump, lap brass, Fed primers, I even calibrate my scales every time I use them. Loads I have googled seem to be around 43/44 @ 3000-3150.
My point was more about the max figures in the lee manual.
87gr bullet - 46.6 - 3084
90gr bullet - 40.9 - 3127
So 5.7gr powder difference for 3gr increase in bullet!
Vit data give max for 85gr @ 43.6 - 3179 .........and 46gr for the 85grTSX but that is a banded bullet that doesn't generate much pressure due to low friction .
Shows how much individual rifles need individual loads working up for them.
I'll check again next time I'm out.

c18rch senior member Posts: 510	Load data DOUBLE CHECK IT! Dec 6, 2015 9:50:29 GMT Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by c18rch on Dec 6, 2015 9:50:29 GMT The TSX is a monolithic bullet. It needs the bands because copper isn't as malleable as lead. Even with the bands friction will be similar to a lead bullet. But yeah, I agree, it shows the need to work up a load.
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oaken
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Posts: 351

Load data DOUBLE CHECK IT! Dec 6, 2015 10:59:00 GMT via Tapatalk

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Post by oaken on Dec 6, 2015 10:59:00 GMT

Data for TSX is usually plus a few% due to low friction and reduced pressures. I remember a disclaimer note from Barnes in the bullet box, suggesting that the bullet could be pushed harder than conventional bullets due to the lower friction from the banding. I certainly found this to be true.
TSX should not be considered normal in terms of pressure and load recommendations.

Load data DOUBLE CHECK IT!

Post by oaken on Dec 5, 2015 12:37:17 GMT

Post by davet on Dec 5, 2015 21:43:31 GMT

Post by c18rch on Dec 5, 2015 22:48:00 GMT

Post by oaken on Dec 6, 2015 9:23:16 GMT

Post by c18rch on Dec 6, 2015 9:50:29 GMT

Post by oaken on Dec 6, 2015 10:59:00 GMT

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