irritating when they change profiles on the same bullet

[roval]

i have used 45 ACP MBC 230 gr RN hitek coated softball for several yrs. the loads that work in my 1911 and sig 220 don't feed well in my cz97b so i've learned what COAL works for the CZ. i was still working through the last of my prepandemic 230 gr rn bullets and started on a box from 5/2021. the bullet profile changed. the bullet is "chunkier" and has to be seated much shorter than the previous bullets. old one would plunk in the CZ at 1.25-1.255. the "new" bullet has to be seated at 1.212-1.213 to plunk. will have to see how these shoot before loading more of the same. i hope this doesn't increase the pressure significantly. i would think a chunkier 230 gr RN bullet would have less bullet in the case when loaded to plunk but it looks like the base is deeper instead. . not too keen on working up the load which is why i stick with the same bullet. if not for the CZ this would be a non issue as the 1911s and the p220 has no problems with longer COALs. anybody else noted the change?

i think i've used 9 mm 147 gr and 45 ACP 200 gr SWC hitek from the same order and didn't notice a chamge in those bullets.

 

[LiveLife]

45 ACP MBC 230 gr RN hitek coated softball ... loads that work in my 1911 and sig 220 don't feed well in my cz97b ... if not for the CZ this would be a non issue as the 1911s and the p220 has no problems with longer COALs.

anybody else noted the change?

If there was change to bullet mold, I would think call/email to MBC customer service would produce faster and more accurate answer than polling the gun forum.

I mean, what if they are shooting 1911s/P220s? They may not notice any feeding issues ... Right?

 

[ms6852]

Have you measured the new bullets. They may appear chunkier but make the composition of lead and alloys have changed. I would still load the same for the 1911 and the sig, and just drop the load .1 or .2 for the CZ. This way you keep your dies the same.

 

[ballman6711]

Have you measured the new bullets. They may appear chunkier but make the composition of lead and alloys have changed. I would still load the same for the 1911 and the sig, and just drop the load .1 or .2 for the CZ. This way you keep your dies the same.

Or just use a different bullet for the CZ. Maybe a different brand or color, something easy to identify. Either way you'll probably still need to adjust the charge for the CZ.

chris

 

[roval]

the new one measures 0.642 vs old 0.656. they are both rn 230 gr hi tek coated 0.452 the bevel is less pronounced on the new one. i will just load 2 more 0.2 increments lower than current load of 700x to the range. i haven't tried out new loads due to the lack of primers. found 2 of the old ones i pulled for some reason (red) vs new ( black)
what i am trying to figure out in my head is with the new one being shorter by 0.015 and being seated 0.129 deeper(1.250 vs 1.212) then the base of the new bullet is deeper in the case by .114. is that correct?

 

[higgite]

the new one measures 0.642 vs old 0.656........ what i am trying to figure out in my head is with the new one being shorter by 0.015 and being seated 0.129 deeper(1.250 vs 1.212) then the base of the new bullet is deeper in the case by .114. is that correct?

First off:
0.656 - 0.642 = 0.014, not 0.015
1.250 - 1.212 = 0.038, not 0.129

So, if the new bullet is .014" shorter than the old bullet and is seated to .038" shorter COL, the base of the new bullet is .024" deeper in the case than the old bullet.

 

[roval]

math was never my strong suit but i rounded off the measurements wrong as well ha ha... so download the increments rather than upload. maybe the increased bearing surface will make it more accurate than the previous one.

 

[roval]

man i find trickling charges so tedious. 19( 10 and 9 ) rds total took me close to an hour to do.dipper and then trickle ... off to the range.

 

[FROGO207]

Just a suggestion from a longtime reloader. I find dip short and use a small spoon to shake the propellant onto the scale pan is much faster than trickling. I use a 1/4 teaspoon metal measuring spoon like bakers use. It takes a bit to figure out how to shake/tap the spoon to meter it out but practicing it for a half hour or so a couple times and you'll retire your trickler to the attic.

 

[Random 8]

Just a suggestion from a longtime reloader. I find dip short and use a small spoon to shake the propellant onto the scale pan is much faster than trickling. I use a 1/4 teaspoon metal measuring spoon like bakers use. It takes a bit to figure out how to shake/tap the spoon to meter it out but practicing it for a half hour or so a couple times and you'll retire your trickler to the attic.

A. 303 British case with a U bent into the mouth is my trickler

 

[GeoDudeFlorida]

A. 303 British case with a U bent into the mouth is my trickler

I throw charges using a dipper and then trickle using the same dipper. I have a Frankford blue trickler for tricky to trickle stick powders but I seldom use it since I made custom dippers for my loggish powders.

 

[Show Me]

man i find trickling charges so tedious. 19( 10 and 9 ) rds total took me close to an hour to do.dipper and then trickle ... off to the range.

I trickle before going to the range.

Never had an issue weighing loads. Use proper size dipper. Dip powder into pan. Use smallest dipper ,scoop powder , tap tap tap into pan and up comes beam.
Next!

 

[lordpaxman]

I agree that when bullet makers make changes to an existing bullet they really should let their customers know. We go through a pretty extensive work up for load development and that might be for a number of guns in the same caliber.
Blue bullets did that to a 9mm offering, and I understand the need to do it, but I called and said “…ya know…”. They were also understanding and now I see a sticker on their boxes “bullet profile has changed”. I believe I have some .40s that have that also.

 

[roval]

i am not too keen on the new bullet but will work with it since i have 2000 of them. i had problems feeding not with the cz but with a 1911. with the deep seating there's a case bulge mid case( like a 147 gr 9 mm load- that one has never caused problems). this feeding problem only happened with one round but the case bulge was not infrequent. i will redo a workup with hornady data with bullseye where i saw their lead rn 230 gr bullet had a coal of 1.210. it's a drawing but seems to have a similar profile to the current bullet.

 

[Jim Watson]

Right. I was inconvenienced when one outfit sent me 124 gr NLG 9mms instead of the grooved bullets I was set up for. Then they changed back! But I had die settings to return to and am glad of it.