I got into casting my own boolits a few years ago specifically for use with Subsonic 300 BLK.
This forum was a priceless resource for helping me get up and running and enabled me to purchase my first NOE 247 FN WHISPER mould.
Most importantly, I had all the information required to safely make these boolits.
The issue that I have come across is reliable feeding in an AR platform.
I started a thread over at 300 BLK Talk trying to get the 247 NOE Boolit to feed reliably.
http://www.300blktalk.com/forum/view...?f=141&t=83966
This thread is not intended to continue the discussion regarding function of the 247 Grain NOE in the AR platform.
It is intended to discuss the feasibility of casting boolits with a long unsupported secant nose.
Several bullet manufactures have developed projectiles with a profile that is optimized so they will feed reliably in a 300 BLK AR.
Here are several examples:
125 Grain SMK:
110 Grain Barnes TAC-TX:
Lehigh Defense 194 Maximum Expansion:
Lehigh Defense 110 Controlled Chaos:
Remington UMC 220 Subsonic:
AAC / Robert Silvers realized early on that for the 300 BLK to perform at the same reliability level in an AR platform as 5.56 NATO, it needed to use projectiles that had the optimal dimensions.
Optimal dimensions being:
- A projectile that was long enough to be magazine length when loaded.
- A projectile that contacted the magazine rib in a manner that mimics the shoulder of 5.56 NATO brass.
- A projectile that is able to withstand the harsh environment of the Direct Impingement Action and Feed Ramps of an AR.
- A projectile that is of the appropriate weight for either Super Sonic or Sub Sonic use.
This leads me to the point of this thread.
Why can't a cast projectile / boolit be utilized to achieve the same results.?
Using the online tool over at Mountain Molds, I designed this boolit:
My intention was to design a boolit mould that would function the same as the Remington 220 OTM Subsonic.
It has the same nose length as the 247 Grain NOE (.875") and weighs in at 245 grains.
The Mountain Molds online application will not allow you to order this design since it violates the program's parameters regarding the Meplat.
I apologize if the question / idea I'm posing is "stupid", but if this design is working with solid and jacketed bullets, why wouldn't it work for cast boolits?