Re: Componants are finally all here!!!
The way I figure taper is to take the base diameter, actually the diameter at the bolt face if your looking at a chambering reamer print, take this base diameter and subtract from that the shoulder diameter.
This will give you a certain value, say "X".
Then take "X" and devide it by the length from the bolt face to the body/shoulder junction. This give you the taper per inch of case body length.
For example, here is my 338 AM dimensions:
Base/Bolt face diameter...0.6381"
Case body length..........2.5792"
Total taper(0.0201") divided by case body length(2.5792") equals 0.0078" or 7.8 thou of taper per inch of case body.
I would agree with BD408 the difference in taper between his 338 ST and my 338 AM is meaningless as far as performance potential is concerned.
Kirby Allen (50)
Allen Precision Shooting
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