MBC 45 ACP, 230gr LRN OAL question

[Rule3]

Yes, I am sure this has been beaten to death but please bare with me. I stayed awake all night pondering this Searching MBC and 45 ACP just makes my computer melt.

I have loaded boatloads of these and just wondering what OAL you are using.

The main gist of my question is how much of the driving band if any do you leave exposed? Does leaving some help in feeding the round? Why not just seat to the edge of the driving band?

Yes, I have done the plunk and drop and roll test.

Trying to finally arrive at a one size fits all for 1911 and non 1911, 45 pistols, not a different OAL for every 45 pistola.

I have loaded 1.250, 1.260 and others.

Speer lists 1.270
Hornady 1.245
Lyman 1.272
Hodgdon 1.200

True they are not the same bullet, but I need order in my life

Thanks

 

[rcmodel]

I load 230 FMJ-RN and Lyman #452374 LRN to between 1.266" - 1.271", same as GI issue ball.

However, your lead bullets with a driving band shoulder will have to be seated to within a thumbnail thickness of the edge, or they won't chamber in guns with hardball leade length.

Whatever that OAL turns out to be, is correct for that bullet design.

rc

 

[Rule3]

That's pretty much 1.250-1.260. Are you saying with more of the shoulder exposed they will not chamber, I guess that is what I am try to figure out. Why not right to the edge?

Kinda like the magic length with LSWC, drove me crazy as just a slight difference between go and no go.

 

[rcmodel]

I am saying they won't chamber in barrel cut with a short leade designed for RN bullets.

I have no Idea if they will chamber in your gun, because you didn't say what your gun was.

But if you want a "one size fits all" load like you said?

You will have to keep the full dia bullet shank mostly inside the case just like a wadcutter, or it will hit the rifling leade in many guns.

rc

 

[ljnowell]

I load that bullet to 1.255" and load it over 5.5gr of AA#2. Very accurate load. It has no problem chambering in my 1911, xd, Glock, etc. They all eat it up.

 

[jr_roosa]

Mine have to be seated a little short (compared to GI ball) to chamber in my colt if I remember correctly. I seat the so they "headspace" on the driving band since most of my brass is too short.

The ogive isn't the same as ball.

I'll check when I get home.

J.

 

[REL1203]

I load my MBC 230g RN to 1.252"

 

[squarles67]

I use 1.24 with MB 230 LRN

 

[moxie]

I load my MBC RNLs with, as rc noted, a thumbnails thickness of shelf showing. This works out to an OAL of 1.250 in my case.

 

[tkcomer]

1.250" for me. That's where they seat best in my Kimber.

 

[JRadice45]

I am still working on this as i only ordered a sample pack when I was experimenting, I came up with 1.240" avg oal so that they passed the plunk & spin test in my Kimber's chamber. The short oal fed fine.

 

[Rule3]

Guess my 1.250 is within the going length. I works in my 1911's and others.

I didn't know if trying to lengthen it a bit would result in a bit more accuracy or if I would be able to tell the difference.

 

[Vitruvianman]

I used 1.250 for my Sigs and worked flawlessly

 

[ljnowell]

Actually, I posted on here about it once, but I changed oal only on my load with that bullet and the groups tightened up. A bunch of people told me I was crazy, but I tested it three times, there was a big difference. I went from a 1.270" to 1.255" and it became my pet load.

 

[Fishslayer]

I use my RIA Tactical for plunk tests. Internet lore and my own tests show it has a relatively short leade (is that the right term?). .452" lead rounds that plunk in the RIA will always plunk in the Ruger. Not so the other way around.

It's especially sensitive with the "shouldered" LRN.

 

[jr_roosa]

Well, not as short as I thought. 1.260" and I measure WWB at 1.270"

-J.

 

[mnhntr]

I load all of my RN/Ball/FMJ .45 acp to 1.26

 

[coalman]

I load 230gr LRN to 1.235" because it runs in anything I have. Longer runs in the 1911, but not the LWD Glock barrel.

 

[Rule3]

I load 230gr LRN to 1.135" because it runs in anything I have. Longer runs in the 1911, but not the LWD Glock barrel.

That's short??

 

[Sal1911A1]

I use thousands with Win 231 5.1 grns 1.255 OAL + or -.

 

[ArchAngelCD]

99% of my 45 Auto ammo has an OAL of between 1.250" and 1.260". I have only one 1911 so I don't have to worry about making the ammo work well in multiple pistols.

I have no idea hoe Hodgdon seats the bullets to 1.200", I sure can't get the bullet that deep without worrying it will set-back...