30-378 ASIC CIP+ Magazine that actually works????

[bulletbikebryce]

I am trying to put the finishing touches on a 30-378 build and can't seem to find a detachable magazine that works for the 30-378 with my setup.
I have a Manners Pro Hunter Stock, Impact Precision 787 Long Action, Proof Research Barrel, Khales k525i scope, Hawkins Precision DBM CIP+ (3.85" long) bottom metal. Everything works great together, but I can't seem to find a magazine that will hold the massive 30-378 bullet. Closest thing I have found is the CIP+ Lapua .338 Mag Magazine. Although lengthwise it fits (barely as my COAL is 3.745" and the mag will hold 3.75" COAL) and I can get one bullet into it, but the neck on the 30-378 is about 0.2" longer that the .338 Lapua, so the vertical support on the Accurate Mag CIP+ ASIC magazine hits the shoulder and so I can't get more than one bullet in it. Has anyone successfully found an ASIC CIP+ (3.85") magazine that will hold the 30-378 cartridge???? (See the picture showing the neck on the brass that will hit on this indented ridge on the mag if I load more bullets in. This is my third attempt and haven't had any luck. ANYONE???

 

[V35BTC]

I started using UM Bottom Metal and 4" mag on the 30-378 builds I have done recently. All builds prior to this were BDL and wyatts boxes. It feeds perfectly.
Here is one I sent to a customer a few weeks ago with UM metal and mag.

Your other option is to mill out the ribs on your magazine.

 

[waspocrew]

Long Action RUM/PRC 3.850” AICS Magazine

The AICS 300 RUM magazine is a steel magazine designed for the high-shoulder Ultra-Mag case and others like the popular 300 PRC. It features a length of 3.850" and is heat-treated for durability.

xlrindustries.com

This may work. Might be worth a call to confirm OR just cut the magazine ribs out as mentioned above.

 

[bulletbikebryce]

V35BTC-

I started using UM Bottom Metal and 4" mag on the 30-378 builds I have done recently. All builds prior to this were BDL and wyatts boxes. It feeds perfectly.
Here is one I sent to a customer a few weeks ago with UM metal and mag.

Your other option is to mill out the ribs on your magazine.
View attachment 636214

What size of UM Magazine works for the 30-378? Long XL: Magnum or the Long XL: Lapua?