Same bolt face in 243/260. It's easy and can be done in under 15 minutes with minimum tools. I don't post as often as the regs on here, but I'm pretty sure most will advise you to use your search feature.
Also, there are a bunch of youtube vids showing you what you need to do. I know it's "scary" the first time, but it's really very simple. Don't over think things and just do it.
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