Maybe you want to, but
should you? Most folks with experience shooting ported barrels say no, in fact you shouldn't.
But it's your barrel, your $$$, your decision.
lpl
==============
Porting: A few new guns, notably a large part of the Japanese
Browning Citori series and many of the Berettas, now come with barrel
porting standard. There are also a dozen aftermarket companies that
perform this modification. Does it actually work? Probably a little, but
equally probably, not enough to matter. It definitely does not work as
well as it does in the high gas pressure environments of rifle and
pistol. Stroboscopic photography seems to show that porting does indeed
slightly reduce muzzle jump when the gun is unrestrained. The heavier
the shell, the better it works. Whether the reduction in muzzle jump
will be noticeable to the shooter is another question, especially if the
shooter uses light loads.
In the 1970s the Technoid conducted a blind comparison (some say that
all of the Technoid's comparisons are blind) of Magnaported barrels vs
standard barrels on a Remington 1100 and could detect absolutely no
difference. Then again, it is hard to tell with gas guns. His later
tests on two identical Browning Citori GTI O/Us, one factory ported and
one not, also showed no discernable difference. We are talking about
muzzle jump here. No one has ever substantiated any claim that porting
has reduced rearward recoil, although several of the machine shops claim
it. Be aware that many types of porting increase muzzle blast to
obnoxious levels, but other port hole shapes do not seem to.
--
http://www.shotgunreport.com/TechTech/TechnicalTracts/ChokePort.html