My Email may be slow, but I just received a email from Sierra on their 375 Smk's today. I had spoken with them about 3 months back when researching the correct barrel twist rate for my 375 cheytech project . At that time they told me that they would be coming out with a 375 smk but didn't know when. I do not know if they are same specs as the ones they produced for cheytech in the past or if they have changed them. Just thought I would share this news for the big 375 shooters. You can read more of the details on their website.