LT-32 and 6ppc

[joshb]

I spent an hour searching old threads for info and didn’t find more than vague data. I downloaded the accurate load data. For a 68 Berger, they show 25 grains to 27.7 grains max. My search found some guys going higher with good results. I’d rather not load a bunch of rounds above max, so:

What is your max load?
What is your “good load”?

All the “watch for pressure signs” and “all guns are different” warnings are a given in my thinking. If the general consensus says 30 grains is too hot, or 29, etc. etc, then I won’t have to load above that, then pull them apart.

The rifle is a Wichita action.
Lapua brass.
68 flat bases Berger

Thanks! Josh

 

[Link]

I was looking for just this info yesterday. I was shooting 29.1 gr with a 66 fb and was getting some cratering. They shot ok but I am looking for a more brass friendly load. Have you done a ladder test? Start low and work up. Pulling bullets down is better than a failure. I am sure you will have others chime in. :}
Link

 

[Mulligan]

Josh,
I shot a match a few weeks ago, I had a bunch of questions after the match so I went to the range and did some testing.
In my gun, I cannot get enough Lt-32 in a PPC case to get to pressure signs with the batch of 68gr BT Barts Bullets I have. 28.3 to 28.6 looked like where it wanted to shoot in the cool of the morning (~85*F). By afternoon on match day it was over 100*F and I reduced my charge by 2 indents on the Harrell's thrower.... ~.09gr per indent. YMMV
CW
Edit
Please keep in mind, I am a complete rookie with a PPC.

 

[Greyfox]

I have found that every 6 PPC I've owned in the past few years has shot very well with 28.3, 28.5 LT 32 or both depending on tuner adjustment. There is one local competitor that will occasionally go to over 30 grs once in a while. That would be a little uncomfortable for me, but it seems to work for him. He does not come to matches preloaded as most of us do (UBR) and makes adjustments as conditions dictate. Sometimes he does very well, others not so much.

Rick

 

[Link]

29.3 on that chart seems to be a flat spot? My uneducated guess ?

 

[Mulligan]

29.3 on that chart seems to be a flat spot? My uneducated guess ?

It is, however the targets did not agree.
Likely just the trigger puller, however mid 28's worked well.
CW

 

[Mikemci]

It is, however the targets did not agree.
Likely just the trigger puller, however mid 28's worked well.
CW

Nice record keeping method Mulligan.
You didn't note your seating depth. Are you touch, jam or off the lands?
Thanks, Mike

 

[ckaberna]

Josh, I am just learning the ppc but what I did was start at 27gr and went up .1gr all the way to 28.5. Never had pressure signs with the lot of powder I have. Then I went and loaded for groups, on that day, 28.1 gr. Produced the smallest group I have ever shot. This is with a bat 3L with 24” (I think) Krieger and 68 grain bergers at 65F. I got to working with another caliber for a different purpose and haven’t shot any more with the ppc since this past spring.These were .006” past light touch. It was amazing to watch groups start out “big” and come together to basically one hole as I stepped up a tenth of grain at a time. I will dig that target out and get you a picture. Note: I am not using a tuner.

 

[Mulligan]

Nice record keeping method Mulligan.
You didn't note your seating depth. Are you touch, jam or off the lands?
Thanks, Mike

ITL ~.006

CW

 

[R.Morehouse]

tag

 

[joshb]

OK! Thanks guys! This is my first go with Lt 32. I have 4 guns with 6ppc barrels that I’ve decided to get shooting. I bought an eight pounder so I can shoot the same powder for a while. I have a few thousand 68 Berger’s and a thousand JDs. I’m starting with the Wichita, then the Panda and then the Hall. When I gain enough feel for it, I’ll get out the Borden I’ve been saving.
I’ll start at 26 and go up to 29, in .3 grain bumps and see what works.
Again, thanks for the help!

 

[Tim Singleton]

Idk the lot you have
Betqeen 28 to 28.8 should work most days

 

[Greyfox]

OK! Thanks guys! This is my first go with Lt 32. I have 4 guns with 6ppc barrels that I’ve decided to get shooting. I bought an eight pounder so I can shoot the same powder for a while. I have a few thousand 68 Berger’s and a thousand JDs. I’m starting with the Wichita, then the Panda and then the Hall. When I gain enough feel for it, I’ll get out the Borden I’ve been saving.
I’ll start at 26 and go up to 29, in .3 grain bumps and see what works.
Again, thanks for the help!

No need to waste time and components starting at 26. Start at 28 and go from there. Fine tune with seating depth.
Rick

 

[ckaberna]

OK! Thanks guys! This is my first go with Lt 32. I have 4 guns with 6ppc barrels that I’ve decided to get shooting. I bought an eight pounder so I can shoot the same powder for a while. I have a few thousand 68 Berger’s and a thousand JDs. I’m starting with the Wichita, then the Panda and then the Hall. When I gain enough feel for it, I’ll get out the Borden I’ve been saving.
I’ll start at 26 and go up to 29, in .3 grain bumps and see what works.
Again, thanks for the help!

You can use .3 grain bumps to find maximum loads, but keep in mind .3 of a grain is a BIG difference in the that small case.

 

[Tim Singleton]

Like Rick suggested go to 28 to start
Use the Boyer method to find seating depth and powder range
Seating depth is important '!!!!!!!!

 

[joshb]

Ok!
I’ll start at 28 and go up to 29 in .1 increments and reread my Boyer book.
I usually start at touch.

Where would I find the lot number on an 8 pounder?

 

[Tim Singleton]

Little sticker on bottom of jug
Maybe like this

13
10-15-18

The two digits are the lot
This example would be lot 13

 

[joshb]

Little sticker on bottom of jug
Maybe like this

13
10-15-18

The two digits are the lot
This example would be lot 13

Thanks Tim!
No sticker on bottom, just some stamping pressed or melted into the plastic.
White sticker on the side had 011719.
9479400688 under bar code on label.

 

[Ccrider]

Are there good lots and bad lots?

 

[joshb]

Are there good lots and bad lots?

I’m assuming there are slower and faster lots. I’m also assuming an 8lb. jug will keep me shooting for a while.
Just did the math. Should be around 1850 shots if I only spill a little.
370 five shot groups. Yeah. That’ll do for this year.