Was going to post a similar thread concerning this subject about projectile ammo but noticed this one, particularly to talk about the Rail Gun: the cost to refill, the carried amount at one time, & the overall effectiveness (damage). Putting the cost and damage to one side for a second, I really like the idea of ammo racks so you can indeed carry more refills with you, perhaps as a downside a full reload on the fly of such a refill shouldn't happen quickly and within seconds, but even if this refill reload takes 20 seconds or so, I feel this refill is a very good idea.
I am still in a Sidewinder, but maxed out with C2 A PwrPlnt/Shields/Thrusters & C1 A Dist. Have been using C1 E Beam Lasers that are very effective on the whole, mainly for target shield collapse and not too bad at hull damage, but not necessarily brilliant, so once I found a station with a varying array of all weapon types decided to try a few projectile out as the main downside to Beams is their high power draw and as I mention, not that good for hull damage. As I had been spending most of my time trying to locate these top upgrade outfittings for the Sidewinder (had to venture into distant bubble to find them), I hadnt as yet tried any other weapons since upgrading my pulse lasers to beams, so firstly changed these Beams to a Rail Gun & fragment cannon. I went out, succeeded in killing one Cobra, nearly an Eagle after, but couldnt finish it off because I had run out of all ammo. I would say being unkind to myself my hit ratio was about 50%, so was a little suprised when I had to bug out against this Eagle as I had nothing to shoot at it, so back to the station to reload all, and to my horror I had a bill for 18000cr (most being the Rail Gun ammo). Forgive me, but particularly considering the Rail Gun's effectiveness (nothing particularly special over the Beams), a single individual rail bolt costing 483cr is outragiously expensive for starters and in the Sidey one can only carry 31 shots, and as far as I can tell a Rail Gun is not that much more effective as only one of the previous Beam Lasers. I of course understand the main advantage over the my previous Beams is the Rail Gun's less demand for energy and draw, so yes I could zip around in the battle with pips to engines for the most part, but simply feel there needs to be some further re-balancing of these weapons over each other. I wouldnt be as disappointed with the Rails if the ammo wasnt nearly half as expensive to replace but mainly the amount one can carry in a Sidewinder makes them more or less useless as a viable option in this craft.
So... balancing the effectiveness is one arguement, which even if it stays as it is now I could happily live with them even if I do think they should be a bit more lethal, but mainly the cost of a full reload has to be considerably reduced, as on average a bounty reward for the destruction of one hostile doesnt come remotely close to re-embursing the cost of taking it out in the first place, and one needs to be able to carry considerably more ammo in one go so one can take out more than two or three hostiles at best without running out of ammo. (Or carry an amount of said ammo racks)
This is written from a persective of presuming one should at least break even, financially, from taking out a hostile (unless Im taking the mick and using two missile launchers, but in this case I was awarded approx 8000cr for the Cobra (so a decent bounty) & the bounty on the Eagle was approx 2000cr if I was able to finish the job). With only just one Rail Gun, it is an expensive undertaking, and as an effective tool for the job, not that much more efficient than using the free Beam Laser (other than energy use/and the lack of the ability to divert pips to other systems as often). So yes, I do understand the main downside to the Beam Laser and the upside to the Rail Gun, but there's no real noticable advantage over the Beam using the Rail, only really a costly disadvantage.
Cmdr Lancer