which alarm cable (copper or copper clad aluminium?

hi guys. just a quick question regarding on alarm cable. i have just bought cqr 8 core alarm cable (copper clad aluminium) for my external bellbox. the cable distance between the panel and the bellbox is around 25 meters at a guess. the bellbox consumes around 400ma (texecom oddysey 3).

so my will this cable type affect the bellboxes performance due to greater resistance over pure copper?. should i go ahead and connect this up and not worry?. or should i strip it out and buy the cqr pure copper alarm cable.

thanks in advance cheers