Not really, it's a five -iron, it's like keeping a fully loaded spare mag for your 1911.I would fill it up with all 7 rounds. Suppose you reload and fire off those 5 and then need more? If you had fully loaded the speed strip you would have 2 more rounds in case of emergency.
Loading like you do is akin to just putting 5 rounds of .45 ACP in my 1911's magazine. No thanks.
Were he to keep all seven rounds, it'd be like having a fully loaded spare mag plus another partial mag.