Howa Mini Rifles, Builds, and Upgrades

[bnsafe]

i might take ya up on that. will see

 

[Stocky]

i might take ya up on that. will see

If you dont its very easy and the 5 shots actually feed better due to the spring being more compressed. I had to stretch my 10 rounder spring to get it to feed round 10 but I've not been able to make a modified 5 rounder misfeed.

Also a dremel easily opens the mag length up to 2.39 which happens be be about where 73 elds 69 and 77 tmks all touch the lands.

 

[KyleR1985]

If you dont its very easy and the 5 shots actually feed better due to the spring being more compressed. I had to stretch my 10 rounder spring to get it to feed round 10 but I've not been able to make a modified 5 rounder misfeed.

Also a dremel easily opens the mag length up to 2.39 which happens be be about where 73 elds 69 and 77 tmks all touch the lands.

Agree with all of this, except my .223 mini the 77tmk hits the lands at 2.495”.


Some absolute measurements for everyone(subtract the distance you believe to be sufficient to not make contact with front of bullet), may vary between guns but I doubt it:

The stock mags windowed allow 2.39”

The Jefferson outdoors hinged metal allows 2.475”. It can be opened up to 2.5” by just taking .025” off the inside back edge of the mag box.

The nub on the back of the action inlet can be ground down to increase the available length of the hinged metal mag box to 2.510”… or more if,,,

The bolt catch for the mini bolt can be ground down to allow the bolt to travel further back to allow up to 2.575-2.6”. I ground the bolt stop face to do this.

Now I have to go back and file the nub on back of action inlet to match. It’s not an easy task with hand tools as there’s no room to get a long stroke, grabbed the right dremel bit, just need to find time to finish.

My expectation is that I can get the gun and the Jefferson metal to accept 2.55-2.575” oal ammo. Once I’m there, the last piece is a mag box that will allow that length. Chris at Jefferson thinks it’s no problem.


As stated above, anything past 2.5” will be overkill for light bullets up to the 77’s.

But it will open things up for throating, 80/88/90 class bullets, and the heavier 112/115 bullets to go with the 6 dasher I made. 6x45 gets a lot more interesting at 2.55” too. And I think a 6GT could start to make sense at these lengths too.

I’ll update here once I get the action opened up fully, and find a mag box solution.