Below is the result of a 139gr lapua Scenar used on a feral goat, shot placement deliberately behind the shoulder (meat saver shot) in order to study light resistance. Impact velocity was 2approximately 2650fps, a slow killing pin hole wound. I was about to take a follow up shot when fortunately, the animal expired. These results were repeatable and were not a one off.
I then took the Scenar and trimmed the meplat to a similar diameter as the A-Max below the plastic tip (approx 115 thou diameter after trimming). I took the same shot on another feral goat but slightly quartering. There was still a slight delay in killing (no immediate hyrdrostatic shock transfer) so the goat wandered about 10 yards before expiring. However after the bullet expanded, the fragmentary wounding and hydraulic shock were incredible. Note how the lung has a pin hole wound, but after passing through the lung, the projectile finally succumbs and fragments as it meets the liver.
This bullet modification was repeat tested, results were the same, slightly delayed kills with rear lung shots but fast kills on shoulder shots (initiating faster expansion)
The gradual or slightly delayed expansion hints at the possibility of this modified projectile being acceptable for use on larger bodied animals (Mule/Red deer), carrying fragmentation to a deep level where otherwise, a heavier frangible bullet can prove more emphatic. However, there is still the risk of surface bullet blow up and shallow penetration, more testing will be required in order to obtain useful results regarding the potential of the trimmed 139gr Scenar as a large deer, long range bullet. BC incidentally was .550 (duplicates the A-Max), though no testing was done past 430 yards so more study will be required here also.
Performance of the trimmed Scenar has so far been very good in that the projectile has up till now, proven consistent, neither surface blow up or pin hole wounding. These two potentials (shallow penetration or pin hole through and through wounding) has happened with other long range match/hunting bullets in 6.5 caliber of late, when used on large bodied deer. Nevertheless, as stated, more testing is required, more time.