2 of the bolts are single shot and one is from a No4 Mk1 303 (c0ck on close) so spring compression is not a problem but for the rest after reading pages and pages of opinions, its not that much of a concern to me. There's been research done and apparently static pressure doesn't kill springs, working them does. You can start a 20 page debate over this so lets try to not get into it here.
But an old shirt or rag and a strong hand should allow you to release and engage the firing pin if that's what you want to do.