MidwayUSA is promising it’ll start shipping new .450 Bushmaster ammo from Remington on 10/24/09.
Greetings to y’all from Georgia.I have been following this on going process with great interest.
I bought a 450 bushy 20″ rifle in early spring,and 3 boxes of factory ammo.27.00 a box is pricey,but ya gotta get the brass somehow.Like you,I found out that info,dies,etc would be a while coming,so I just waited,something I am Not known for.I almost sold this gun twice,but kept it.
I have been shooting a .50 beowulf for several years,reloading for it with excellent results,having good data is the thing.
About the same time you started using the Lil Gun,an old friend and I were talking about using it,with a near identical loading as you found.I figured if the .50 with a 335g bullet liked 37.5 of lil,then a good place to start might be 35 of the same in250g,450bushy.
I got the dies and some 250g and 300 g hornady .452 xtps from Midway,and loaded up a few at 35g.This shot well at 50 yds,very close in recoil to factory.But I wanted something to shoot that was less punishing.I loaded some cases to 30g of lil,w 250g bullets,and they hit target dead on,with excellent cycling of the action,and Way more fun to shoot.
I am going to try some other powders and see how they perform.I am glad I didn’t sell this cannon,it is fun to shoot.
I hope this is of some help,thanks for allowing me to ride along.
I loaded up some rounds using H110 and the above data, substituting the Montana Gold 250gr for the Hornaday 250gr SST. I didn’t crony them, I just wanted to see what kind of groups I’d get. 1.5″ with the Hornaday 240gr and 2.25″ with the Montana Gold bullets. 100yrds.
As a side note, and it will be interesting to see how it compares, but I’m finally getting some nice 1″ ‘ish groups at 100 yrds with the Montana Gold bullets using 39.3 grs of H110 and an OAL of 2.05″.
Is the bolt holding open on those 43 grainers now? Make sure that you single load with the mag inserted until you get your head around your situation.
I sure do not see any excessive pressure signs at all. I’d, with caution, suggest an increase in powder (h110) watch for excessive pressure signs and you make the call, in relation to safety. I think you’ll end up in the 2500fps+ arena, which is 3500ft/lbs and with a 200yd zero, is 100% hits at 300yds (on a 8″ paper plate), assuming you get the groups down a little. This blows the doors off the other big bore AR’s and you haven’t gotten to AA1680 yet, which will yield 200fps+ more than you are now getting with the same pressures. Note- Someting to consider, in extreme cold weather (zero or lower) the 296 will ignite better.
I plan to call Montana Gold and talk to their engineer and asertain how thick those 250 jackets are, if they are in fact thick enough, these may end up being the new gold standard.