Congrats on the great finds! I love shotshells. In fact they are my favorite things to find and collect. I have 5,000+ in my collection. Here is a quick rundown on what you have, as best as I can tell you. 1. XTRA-RANGE - This is an early Sears headstamp. As best as I can tell, this is the first "Sears" stamped headstamp that was used. I don't have solid dates, but an educated guess is this headstamp was used in the 1930's. 2. Rem-UMC Arrow - This one will date from 19156-1942/45. At this point I cannot verify the exact end date. 3. Western Super-X - 1927/32 to the early 1960's. This date range is from vintage catalogs and period advertisements. 4. USC Climax - I cannot see the headstamp clear enough to help on this one. This line of shells was around for a long time though. 5. UMC Nitro - 1894-1899 - Nitro and Nitro Club shells are a bit of an enigma. The 1895 UMC Catalog shows the introduction of the Nitro line of shells but makes no mention of the Nitro Club. An 1894 ad in Recreation Magazine lists the Nitro Club shell. A story in an 1895 issue of Forest and Stream talks about a new shell (Nitro) taking the place of the Nitro Club, while an 1896 ad in Outing Magazine is an ad for the new shell - the Nitro Club. On a side note, a noted historian has given me the start date of 1893 for the Nitro Club, but I cannot verify that date! 6. Western Xpert - 1927/32 to early 1960's 7. WRA Rival - 1894-1897 - You won't get any older for named Winchester shells. 8. Federal Monark - 1950's-1960's - This date range is "iffy" at best. This is based entirely on period ads. 9. 1901 Repeater - 1901-1919 - This is a great Winchester head. You have some great finds! Doug