Not that I am aware of is there a complete ballistic comparision between all these chamberings. Best thing to do is plug all the numbers into a ballistic calculator and compare the results side by side.
Got a couple pics taken this afternoon after working in the shop.
Left to right:
338 Edge loaded with 300 gr SMK to 3.820" OAL, 338 Lapua with 300 gr SMK, 338 Allen Xpress loaded with 300 gr SMK to 3.820" oal and finally the big girl, the 338 Allen Magnum loaded with new 265 gr AL RBBT to 4.450" oal.
You can see the dramatic case formation between the 338 Lapua and my 338 Allen Xpress, quite a significant increase in capacity. The Lapua and the 338 Edge have roughly the same capacity for comparision. You can also see that the 338 Allen Xpress can have the 300 gr SMK seated much shorter if you wanted to use something like an HS Precision detachable magazine system. The 338 Allen Mag is just big in every way, diameter, length and capacity!!! [img]/ubbthreads/images/graemlins/grin.gif[/img]
Just got the sake of taking pictures. Here is the standard 338 bullet along side the new advanced designs. From left to right, the 300 gr SMK, 265 gr AL RBBT Wildcat and a 270 gr solid brass projectile.
For those that think you can not use a lead core bullet design to compete with the solid bullets, you are now WRONG!!! The BC of the solid bullet is around .870. Early predicions for the 265 gr AL RBBT are right around .850 to .860.
But the lead core bullet can be driven to higher velocities then the solid and is MUCH more forgiving as far as bore to bore diameter variations and accuracy potential. Not to mention, the solid will not expand, the 265 gr tipped bullet certainly will.
You will notice a line between the tip and the start of the jacket on these bullets. That is because I had Richard make me up some bullets with very heavy jackets and as such, the tip step down was not made to match so Richard had to set the tips in this position so there would not be a protruding lip from the thicker jackets. They are smooth from tip to jacket now, just have this slight gap, will make no difference accuracy wise.
Richard has already addressed this issue for his next order of tips.
Compared to the 300 gr SMK, well, there is no comparision really. It is a great bullet but I personally feel the 265 gr AL RBBT pretty much makes it obsolete as far as ballistic performance is concerned.