ordered up a custom carbide reamer for a 416 rum wildcat, to rechamber my mod 84 blaser, 416 rem. some said it couldnt be done be done, but benchmark stepped up an all went well. now i need to get custom dies made with my reamer. in the meantime i wondered if anyone has experience with loading this round. because of the blaser mag i wont be able to load longer than factory 375 or 300 rum. loads, powders. bullets all open to suggestion thanks brothers!
416 rem ultramag wildcat
- Thread starter tooth doc
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IIRC, @Swamplord built a 416 Warlord and 416 Colossus that might be close to what you are trying to develop. I am pretty sure he can give you excellent advice/recommendations.
375ultramag
Well-Known Member
If you type in 416 Buff in the search their will be plenty of info from J E Custom. On a 416 Rum that he built. Unfortunately he is no longer with us so he won't be able to give you any input but he was extremely knowledgeable and informative and explained it well. Hope that helps.
searched in LRH, no results?
416 BUFF
Over a year ago I started this project and promised to report back with the results.Due to long delivery of the barrel and the holidays I lost about 4 months, but have finished the rifle and started testing loads. With a water capacity in grains of 126.5 (24 grs more than the 416 REM and 8.4...
416 RUM
I found a old post from 2008 about a 416 RUM. I really like that idea necking up a 375 RUM. I have 300’s and 338 RUM’s. JE Custom commented several times on that post. I wonder what has changed in 10- years??? I shoot a 416 Ruger now and just love it but this would be a couple of notches up.
416 BUFF revisited
Well I finaly got some testing done and so far I am very happy it looks like this beast will shoot. Recoil is around 65ftlbs with 400gr bullets and 60 ftlbs with 350 gr bullets so 40 or 50 rounds of testing is enough at one time. Also after 3 shots the barrel starts heating up (the...
cooperjd
Well-Known Member
I'm pretty sure some guys over at accuratereloading.com made a few of these wildcats, called the 416AR, 458AR, etc... I could be wrong about this but I think there were a few. You might check over there.
cooperjd
Well-Known Member
Re: My new .416 AR - Topic
416 458 470 A.R. case drawings - Topic
contact jeffeoso, as i think he created the 416, 458, and 470 AR's. idk if they'll be exactly what you've done, but probably close.
Bump…
HRM Johnny
Well-Known Member
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So far I've only loaded 400 grain A-Frames and also 400 grain Hammers out of my 416-375 RUM. Just like the 416 Buff it is just a necked up 375 RUM case to accept 416 cal bullets. It started out as a 27" barrel but I cut it and recontoured it to save weight to 23". My loads only lost 50fps from chopping 4" off so it's a fairly efficient case. I'll have to dig out my old data but I used H414/W760 and R17 to start and concluded that R17 produced the best velocity and accuracy for me. All loads I tested are below the 3.650" max length my Montana 1999 allows.
