Amp,
If you're actually reading this, I'm going to take a wild guess at what happened here.
You did a google search for the information you wanted. This thread magically came up in the search results. You read the page, signed up for an account, and posted your question.
In doing so, you resurrected a thread that has been dead for four and a half years about something completely unrelated to your question, and it appears that only one other person out of the entire two pages of posts after yours has realized this.
What you need to do is sniff around thehighroad.org a little more until you find the general handgun forum, and ask your question there. Or, better yet, use the search function near the top of this page. I'm sure somebody else has asked about LCP/LCR issues before, so maybe you can learn from their threads.
Welcome to the forum. Good luck getting this thing figured out. And, as the new guy, be prepared for lots of "use the search function!" responses. Some folks around here don't have much patience for pedantic questions from neophytes.
As for your question, I can't offer any help. I've never handled either gun, and they don't much interest me.