I can't find where Hollow points can't be used in SC.
Here is a section right from the SC Department of Natural Resources SCDNR,
Firearms and Ammunition
Hunters are often very opinionated with respect to firearms and ammunition and similarly, there are many misconceptions related to the subject. It is still common for hunters to place more emphasis on their firearms and ammunition than on shot placement. The old saying "I use this magnum because you can hit them in the butt and blow their head off' is still common. Also apparent are skeptical remarks implying that smaller caliber center-fire firearms are less effective and result in deer running further and increased crippling rates.
During this study there were in excess of 20 different center-fire cartridges used to harvest deer. To reduce variability the various cartridges were group by their respective caliber. This resulted in the delineation of 5 caliber groups; .243 cal., .25 cal., .270 cal., .284 cal., and .30 cal.
In order to gain some objective measure of how these calibers performed on deer, we looked at the distance deer traveled. This included all animals regardless of whether they died in their tracks or ran. We found no significant difference in the performance of these caliber groups when comparing how deer reacted. Mean distances deer traveled varied between 14 and 40 yards but there was no apparent relationship with increasing or decreasing caliber size or the inherent differences in velocity or energy that is related to the different caliber groups.
Custom versus Factory
Recently there has been an increasing interest among hunters related to custom firearms and the super accurate shooting that accompanies these weapons. Questions often arise concerning potential differences between factory made and custom made equipment. Since we recorded the type of firearm and ammunition, we were able to check for differences between factory made and custom made firearms. Once again, the distance deer traveled was used as the determining factor and there was no statistical difference between custom and factory firearms. Regardless of the weapons make, deer traveled about 30 yards.
Ammunition
The final question that we addressed in this study dealt with differences in the performance of different bullet types. With the popularity of hand loading and super accurate shooting sportsmen often debate the merits of different bullet types. For the purposes of this study and because there are so many different bullet types, we placed bullets into 2 categories. Group 1 consisted of softer type bullets. In other words, bullets that are designed to rapidly expand on impact. Bullets falling into that group included ballistic tips, bronze points or any other soft point bullet that is of the appropriate weight for the caliber, for southeastern sized deer. For example, a 150 grain ballistic tip bullet in a .30 caliber rather than a 200 grain bullet in the same caliber. Group 2 bullets were just the opposite and included some of the premium types of ammunition loaded with controlled expansion bullets including Partitions, Grand Slams, Barnes X, and various types of solids. Also, bullets that are generally accepted as being too heavy for southeastern sized deer were placed in this group. For example, a 200 grain bullet in a .30 caliber weapon is generally considered too much for southeastern deer. Overall, Group I bullets could be characterized as being explosive on impact, where as Group 2 bullets were controlled in the manner they expand.
Firearms and ammunition - Bullet types
Group 1 – Rapidly expanding bullets such as Ballistic Tips, bronze points, etc. Any soft point bullet of appropriate weight for a particular caliber for southeastern deer.
Group 2 – Harder or more controlled expansion bullets such as Partitions, Grand Slams, Barnes X, etc. Any bullet that is heavier for a particular caliber than is generally recommended for southeastern deer.
Again, using the distance that deer traveled as a measure of performance we found that deer struck with the more explosive type bullets traveled a mean distance of about 27 yards while those struck with hard or heavy bullets traveled an average of approximately 43 yards. This represents a significant difference with deer struck by hard bullets traveling further. The second method of monitoring bullet performance dealt with the percentage of deer that were dropped in their tracks by the respective bullet groups. Again, explosive type bullets significantly outperformed the hard/heavy bullets with 58 percent knock downs compared to 40 percent. Finally, and more subjectively, we looked at the percentage of deer that ran and left poor sign. Again we found a significant difference between the two groups indicating that deer struck with more expanding type bullets left poor sign only about 12 percent of the time compared to over 21 percent for the hard/heavy group.
Conclusions
Shooting percentages about 82%.
The farther the shot, the lower the chance of getting the deer.
Deer ran about 62 yards on average.
Shot placement is determining factor. All things considered, broadside shoulder shot worked best compared to others.
About 50:50, deer run vs. deer don’t run.
Trained dog expedited recovery of all deer that ran.
Dog very important in recovering 61 deer that left poor/no sign, 24 deer judged unrecoverable, and 19 live/wounded deer.
Dog accounted for approximately 15 – 20% of total harvest on hunting area, i.e. 75 – 100 deer.
No difference in effectiveness of various calibers.
No difference between factory vs. custom firearms.
Significant difference between bullet types. This study indicates that rapidly expanding bullets lead to deer running less often and less distance and when they run they leave better sign.
I also read the game laws and can't find where HP can't be used.
Might want to check into this a bit more to be sure.