450 Bushmaster

wallz

CGN Regular
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Location
Prince George
I'm new to one, and see that not many on here are using one.

I guess I will blaze forward.

Going to be trying some .452 plated 230 or 250 grains for practice and 290 gr for hunting.

Slowly getting set up, so it will be a few weeks or months for this endeavor.

Probably start with H110.
 
Barnes 460 Smith and Wesson 275 grain((.451)($35/20)with Lil Gun is an awesome load for hunting. Work your load up. Hornady FTX are good to. Come in 200,225 and 250 gn.
Hornady dies are nice. Have sizing die, seating, side crimping and mouth expander all in one set.
 
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Thanks Archer,

Didn't see those before, and they seem like a viable alternative as well.

I have also been reading about guys taking the larger .458 and sizing them down, just in smaller steps. Might look into that option as well as the .458 seems more popular, and the cost of a few sizing dies will be minuscule in comparison.
 
Well, I had some dies come in yesterday, and had a play date.

Spent some time setting up the 4 dies. Yep, the 4th is to crimp, as you don't want a roll crimp when seating the bullet in straight wall cartridges.

Any ways, I determined my max COL for the ruger no 1 that I'll be shooting with. Book max COL is 2.500" and I got 2.900".

Loaded a few rounds with lil gun in 1/2 gr increments for my next range trip, using cci450, and the barnes 290 gr T_EZ muzzle loader bullet tips at COL 2.800" and see how they run.

Hopefully I will have my plated FP 300 gr 45 cal tips in as well in time to put a few rounds together for said range trip. These will be just range fun, and see how far I can stretch the legs of the no 1.

Hoping to push those 290's fast enough to get an effective 300m range for hunting.

Will report after next range trip.

Also have some sizing dies inbound, and may end getting some .458 bullets to see how easy these size down to the required .452". Might start with the jacketed, and maybe look at the barnes coppers, and see what they size down to. Should be interesting either way.

I'll have to get my brother to send me some of his .458 jacketed tips to work with, so I don't have to buy too many to start with.
 
OP,
To size/draw jacketed 458's to .452 diameter you will need a size die in the 449/450 range depending on jacket thickness.

You'd be better served turning any solids as to not crack sizing dies.

The 450 BM loads I've developed won't be of use to you since they are for direct impingement suppressed use.

As mentioned previously,LilGun will get you velocity compared to H110/296,680.


I prefer the 458SOCOM for it's case capacity & feeding.
 
Well this last weekend was a wash. Snow, and -20 temps kept me from the range. Just not worth the effort in the cold and blowing snow. Good news though this next weekend is supposedly going to be better.

I have 3 sizing dies. .457, .454 and .452. From previous reading some guys took a dremel and made the .457 die closer to .456, just to even out the draw. I'll try it as is and see the outcome and go from there.

I would love to have a mini lathe to just take the copper and turn them down, but the lack of a lathe has me figuring other methods. I realize that I may be a no go with the solid copper tips, and may have to resort to the cup/n/core style lead jacketed rounds. I'll keep this thread updated as I progress in this, just for reading sakes worst case.
 
Just a quick update on this.

Finally had a range day on Saturday. Was nice out, besides the excessive wind. That's okay, as I was going to be testing at 100m so figured it would not matter much, plus shooting my other range toys in the wind is great practice at distance and wind reading.

I started with the 10 rounds I had prepped of the 300 gr plated range fun tips, at a decent high range. Had the scope set up in a few rounds. Amazing what a properly mounted scope can do. New picatinny rail, to be able to mount the scope back far enough on the no1. My first trip with this rifle, I quickly mounted a scope I had from another rifle, but could not get it mounted back far enough, even with offset ruger rings. Was a pain, but a necessary exercise to actually see what I needed to do to mount a scope properly, and to solidify me keeping this rifle. 20 factory rounds.

I then proceeded to start my test with the barnes 290 T-EZ tips muzzle loader tips. I quickly realized I was optimistic in the loads and started on the higher end of things, and only shot 4 of the 12, with excessive pressure building. Was pushing over 2300 fps, and they were hot, so decided to not continue. I did not shoot any of the 300 gr plated rounds I also had to set those up, as they were also going to be hot. Yes, I hesitate actually listing the powder weights I am using, as these will be "HOT" in the standard bolt action or ar type semi auto actions. yes I am over all the listed book maximums, and using the 300gr data. I just looked to confirm, I am pushing the 290 gr at or above the 250 gr bullet data.

Sat evening I pulled the rounds and started my loads lower, and went with .3 gr increments. Also pulled the plated rounds and loaded up lower.

Sun afternoon was another trip out, this time with less wind. Testing went great with some potential loads figured out. Will be loading for roughly 2260 fps with the 290 gr barnes and 2165 with the 300 gr plated rounds. Remember this is with a ruger no1, so I know I can push the envelope a bit with pressures, and still be safe.

I will be watching as I near the 100 rounds down the barrel to see how things settle out, as this is a new firearm.

Will be loading a bunch for next trip out, and try another seating depth, just to rule that out as well, and set my scope to point of aim. Hoping to test out to 300m with this set up, and I think this speed will get me there with enough force for expansion.

Will be able to test the turrets on the scope, test my ballistics program, and get some more rounds through the barrel. All pluses in my books. Will set up an offset for the 300 gr plated rounds, so I can quickly adjust those when shooting at the range, and still be on point of aim. They will be shooting a little lower, so the offset will be easy to set up.
 
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Barnes 250gr TTSX designed specifically for the 450 and lil’ gun shoot sub moa out of my Howa mini. That’s the only hand loading I’ve done for it so far. I did just buy a hundred of the 285gr TSX designed for it but haven’t picked them up yet.

Interesting seeing your results. I have thought about shooting the muzzleloader bullets out of mine but decided to just go with the bullets actually designed for the 450.
 
Barnes 250gr TTSX designed specifically for the 450 and lil’ gun shoot sub moa out of my Howa mini. That’s the only hand loading I’ve done for it so far. I did just buy a hundred of the 285gr TSX designed for it but haven’t picked them up yet.

Interesting seeing your results. I have thought about shooting the muzzleloader bullets out of mine but decided to just go with the bullets actually designed for the 450.

Yea, I have not been able to find any of the TTSX in stock anywhere in Canada, so other bullets where sourced. Plus I really wanted to get close to the 300gr bullet for elk.
 
Just another update.

Was a test weekend. The loads with the bullet seated another .004" deeper pulled things in to a nice 1.5" group, with one pulled, so it would have been an easy 3/4" group. Will now load up a bunch and confirm scope dope out to 300 m. 2262 fps average on the 290gr barnes.

Sent some of the plated loads out to 200m for some fun. They seem to still pack a good punch out there, so this should be fun. These flat nose plated bullets seem to like being seated out a bit further.

On another note, I have also tried to work up a bird shot load, like I had for the previous 444 marlin single shot. For what ever reason I can't seem to get a good powder burn in those, and they barely push the wad out of the barrel. Was using 14 gr of H110 in the 444 case with a large rifle primer, but these are a no go in the bushmaster. Basically only cut back the shot amount going on top of the powder, after cutting the wad pedals back to fit in the shorter case. I guess I'll have to keep reading up on this one and go from there.
 
has anyone tried any 200 grain bullets yet? I have a 300 or so truncated Berry's bullets for 45 ACP that I feel would make good plinking rounds as long as the plating doesn't get stripped off from the velocity.
 
has anyone tried any 200 grain bullets yet? I have a 300 or so truncated Berry's bullets for 45 ACP that I feel would make good plinking rounds as long as the plating doesn't get stripped off from the velocity.

You should be fine with those. I'm pushing the 300 grain plated rounds 2240 fps, and they are proving decently accurate, so the plating I feel is staying together. Was shooting them out and hitting the 200m gong with force, even with my scope rail issue.

I ran into a scope rail issue, so was not able to dial anything of use in on the last range trip. Was frustrated, so was sending the plinking ammo out, to help ease the pain. Have now figured that out and will be ready for a Friday trip out. I can see sending the 300 gr plated tips out to 500m on the next trip out. Will work up from the previous 200m I was doing.
 
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