Looking for a 450 Bushmaster load using Lee 340gr

[brstevns]

Is anyone using the Lee 340gr bullet sized down to .452? Want to try it in a 450 bushmaster build on a 93 Mauser Action.
does anyone have anyloads. Have Lilgun, Imr 4198, H110, and Unique powders.

[lawdog941]

Don't have any data, nor can I find any. From what I've seen, use a gas check if going over 1200. If I were just plinking, and under 1200, (side note) I used to use 13 gr of Unique in my 45-70 with a 405 lead. It was pretty accurate to 100. Prob have to experiment with starting load, 10 gr always comes up, and it will clear the barrel at least.

[brstevns]

I have thought of the 10gr load, wonder if anyone has tired it. Still looking for a heavier load as well. I have looked everywhere as well and have found nothing.

[cwlongshot]

Is anyone using the Lee 340gr bullet sized down to .452? Want to try it in a 450 bushmaster build on a 93 Mauser Action.
does anyone have anyloads. Have Lilgun, Imr 4198, H110, and Unique powders.

I use the 350g Ranch Dog in mine! One of my favorites in the 45/70 so I tried it in the bushy. Sizes down easy. I run mine at .454.

[brstevns]

I use the 350g Ranch Dog in mine! One of my favorites in the 45/70 so I tried it in the bushy. Sizes down easy. I run mine at .454.

Nice to hear, do you have a starting load you care to share.

[brstevns]

Looks as if loads for bullets over 300gr are hard to find. Was wanting to try the 340gr Lee and there 405 gr bullet as well. something in the 1200 to 1400 fps range. Would think 4198 or H110 and Unique would work? Also have a pound of Lilgun.

[lawdog941]

Somebody with quickload could prob give a safe estimate to start with.

[brstevns]

Somebody with quickload could prob give a safe estimate to start with.

That would be nice.

[brstevns]

No one uses these bullets?

[brstevns]

After researching and researching it seems as if the 458 Socom always uses less powder for any bullet weight (starting Loads)then the 450 Bushmaster. This being the case could one not use 458 Socom starting load data for starting loads in the 450 Bushmaster?

[TurnipEaterDown]

"brstevns":this one (GRT) is free: https://grtools.de/doku.php?id=start
It does have the 450 bushmaster, but might not have your bullet. You can toy with other bullets and look at charge progression perhaps from what is available, and see what you can learn.
Be careful, you know models and all that.

[XTR]

The problem is the 450 typically shoots pistol bullets so your outside the weight range most peeps use and getting into 458 SOCOM territory.

I’ve never looked at the 450 case volumes compared to the 458 case? If this is a yet to be built rifle you might consider the 458. Lots more bullets in the weight range you are considering. That’s why I went that way.

I like my 458 with 405s, it’s like a 45-70 in an AR.

[brstevns]

"brstevns":this one (GRT) is free: https://grtools.de/doku.php?id=start
It does have the 450 bushmaster, but might not have your bullet. You can toy with other bullets and look at charge progression perhaps from what is available, and see what you can learn.
Be careful, you know models and all that.

So far have not been able to get the program to work on my computer. I am not going to give up.
Want to thank you for the link.

[brstevns]

The problem is the 450 typically shoots pistol bullets so your outside the weight range most peeps use and getting into 458 SOCOM territory.

I’ve never looked at the 450 case volumes compared to the 458 case? If this is a yet to be built rifle you might consider the 458. Lots more bullets in the weight range you are considering. That’s why I went that way.

I like my 458 with 405s, it’s like a 45-70 in an AR.

It looks as if the 458 socom holds between 2.1 to 3 gr over the 450 Bushmaster. So I would think the starting loads would be a safe place, since the starting loads for the 450 is always over those of the 458.

[brstevns]

Any other thoughts on the matter? If all else fells I do have a 230gr Lee pistol mold I could use.

[brstevns]

Still could use some loads

[brstevns]

Sometimes I feel as if I must have Leprosy or something just as bad. LOL Seems as if there is no answer to my question . Maybe it is just me.

[murf205]

Is anyone using the Lee 340gr bullet sized down to .452? Want to try it in a 450 bushmaster build on a 93 Mauser Action.
does anyone have anyloads. Have Lilgun, Imr 4198, H110, and Unique powders.

Good luck, I had 1 range session with cast that made me think it was going to work but that's the only one. It was a NOE 290 gr round flat. It is a Ruger American and I never got it to come around until I tried Shooters World Buffalo Rifle and Hornady 250gr FTX. As far as a starting load, the FTX 250gr likes 37 grs of the above powder and a CCI std primer with a Lee FCD used gently.Attachment 298290

[TurnipEaterDown]

brstevns: Call Hodgdon and ask for a ballistician. They used to be very helpful.

There are a number of people here who would go figure it out for themselves, and I am sure would be perfectly safe doing it, but like me would be reluctant to provide guesstimation data as there are some things that depend on experience and judgement as to knowing if a person has started out safely or not, and where to stop.

Me, I would go "off the grid" on something like this w/o hesitation, but I'm not going to suggest that you do so by following my advice/judgement when there is a resource like Hodgdon available.

[gregg877]

I just got into .450BM and came across this thread, BRSTEVENS dis you ever find data? There seems to be an abundance as you’d mentioned for the mid 200gr weights up to low 300, but not much else. I’ve got some Hornady 395gr flex tips that I’ve been able to push to 980fps with trailboss, but that seems to be max for that powder. I’d like to push em to 1050 for suppressor use. Any thoughts?