6.5 cm load too hot. what now?

[Richard Coody]

i don't have all of those tools, but,
my brass is trimmed to 1.917
my bullets are between 1.340 and 1.345
bullet width is .2645
my bullet weighs 140gr

my brass width is the same as factory.
the 2nd reload i fired was deformed the same way as first, arguably more so.. but same disfiguration patterns

You need to get them. These are steps that need to be taken each time you begin reloading a new bullet, powder, rifle etc

There are.different methods but the steps are there
Don't load any more rifle rounds until you learn how to use them
You do have a reloading manual don't you.

Lock‑N‑Load® O.A.L. Gauges & Modified Cases - Hornady Manufacturing, Inc

Lock-N-Load® O.A.L. Gauges Regulating seating depth and the resulting jump to the rifling is widely regarded as fundamental to improved accuracy. A few thousandths of an inch change between the bullet and the rifling can make the difference betw...

www.hornady.com

Lock‑N‑Load® Headspace Comparator & Anvil Base Kit - Hornady Manufacturing, Inc

Lock‑N‑Load® Headspace Comparator & Anvil Base Kit Lock-N-Load® Headspace Comparator The Lock-N-Load® Headspace Comparator extends brass life, improves accuracy, and enhances safety. The gauge measures...

www.hornady.com

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[338 dude]

I live in sanbernardino less then 20 mi from you, pm me our phone # I've got headspace guages for 6.5 CM to make shure you didnt set the lugs back, ive been reloading 45years I will help you under stand what every body is tellin you, we can use my reloading equipment at my home my names Don hope you respond

Bravo wagon man!!!

 

[Tokay444]

A question I have is how long is HIS chamber. Can't assume SAAMI dimensions. If his chamber is shorter than his trim length he's crimping the bullet. A carbon ring may also be exacerbating the problem.

I thought a wet chamber (not wet bolt) increases bolt thrust not chamber pressure.

Shoots factory ammo fine.

 

[Tokay444]

Not the best, but better than nothing.

I don’t know if you have ever looked at the drawings for the cartridge and chambers, they are below.

In both drawings on the shoulder is a length at the diameter of .400”. This will be headspace. A 40 .caliber case would have that diameter, or be much closer than a fired 9mm of about .360. You can expand the 9mm a bit, maybe beg borrow or steal a 40 s&w. Pretty common round.

Place the case upside down on the shoulder of you fired and sized cases. The difference will be how far it grew under firing or how much you sized it. The smaller diameter won’t give you a true reading, but will work for comparing the to different numbers.

Next number will be bore diameter, .256”. If you size a piece of 6.5 brass without the expander and check diameter, it will probably be around .259”. Again a bit off but using that the same as the 9mm case you will be able to measure cartridge base to bullet ogive on a loaded round. That will be your make shift comparator set for now.

If you can come up with a 25 caliber case, it will have a much closer actual diameter for an exact measurement,

Even with the wrong diameter, it’s will allow you to measure where that bullet would hit the rifling in your chamber and insure you are not hitting the lands.

Now you have the comparator set people have told you is a must.

I gave you the link to bullet lengths, it’s not perfect due to lot to lot variation, but it’s enough to keep you safe.

Case length + bullet length - COL = seated depth.
Case length + bullet length - seated depth = COL.

Or just use the difference in bullet length to adjust seated depth to keep the load density the same. A bullet .100” longer needs to be seated .100” longer, and needs to be off the lands to prevent higher pressures.

There are plenty of threads explaining different ways how to find the lands. You now have the tools and measurements to keep yourself safe, better tools will of course produce much more consistent rounds. For now it’s safety.

Hope that’s a bit of help.
View attachment 1232670

You didn’t tell him he needs to punch the primers. Experience reading this thread tells me you need to tell him to punch the primers.

 

[itchyTF]

Shoots factory ammo fine.

How long is the factory brass?

 

[Tokay444]

He doesn’t have tools to measure it, but I’m gonna go out on a line and assume it’s saami spec.

 

[itchyTF]

He doesn’t have tools to measure it, but I’m gonna go out on a line and assume it’s saami spec.

That would be my assumption as well, but assuming anything with this issue is risky.

 

[Ggmac]

lol. u have to get the height right. a book , and add credit cards until it hits zero.

The balance beam is basically balancing on a knifes edge , how far do you think you can go before the knifes edge gets wider and changes you weight . I tried what he did and go 2 gr off of a level balance weight . The pan hanger is also a factor in setting up a correct balance beam . The pan hanger use to have small weights in it to rezero yourbeam if you replaced the hanger . They aren’t interchangeable between one scale and another, at least they were not . The scale should be level on both the x and y .
call rcbs and get the reason

 

[Tokay444]

That would be my assumption as well, but assuming anything with this issue is risky.

I think we can all agree, that factory ammo in 6.5 CM falls within SAAMI min and max spec.

 

[Ol Thumper]

Ok let me try this again, I didn’t cut the lad any slack yesterday and my apologies on that. Once he figures out the issue and what he needs to resolve the problem tool wise I’ll see what I have I can send him to help him avoid the problem again.

 

[wagonman]

Guys the young mans name is Jake last nite we talked Jakes gonna come over we live 15mi apart first off I will make sure bolt wont close on a no go gauge, then bore scope chamber and bore, check bolt lugs , hes bringing his brass, dies, powder bullets, priming tool ill keep things simple, show him how to use Hornady comparator gauges, measure cases for expansion @.200 line, trim length, choosing the proper powder and much more, you guys get my meaning I want Jake to be safe as we all do. And may have a new shooting buddy

 

[johnfkingmatrix]

Thanks again ! im still waiting to hear my schedule for the week, and we'll set it up, don.
Thanks everyone

 

[457ciSBC]

Guys the young mans name is Jake last nite we talked Jakes gonna come over we live 15mi apart first off I will make sure bolt wont close on a no go gauge, then bore scope chamber and bore, check bolt lugs , hes bringing his brass, dies, powder bullets, priming tool ill keep things simple, show him how to use Hornady comparator gauges, measure cases for expansion @.200 line, trim length, choosing the proper powder and much more, you guys get my meaning I want Jake to be safe as we all do. And may have a new shooting buddy

Passing along and sharing the fruit of knowledge; that is a win win for both involved, thank you Wagonman.

 

[DiffEQ]

Kudos, @wagonman

 

[KMart]

we talked, hes willing to come to my house, we'll get thing worked out

Thank you for stepping up going the distance. Outstanding.

 

[Ggmac]

Excellent ! Most of us olf darts learned from our fathers or uncles . I the 60s , my uncles gunshop would have evening reloaders sessions, trying to sell the latest and greatest. Similar to the you tube videos but more personal .
Im looking for some older scales i no longer use . They are good but how many does a guy need . If i find the 10-10 ill let the op know .

 

[KMart]

Ok let me try this again, I didn’t cut the lad any slack yesterday and my apologies on that. Once he figures out the issue and what he needs to resolve the problem tool wise I’ll see what I have I can send him to help him avoid the problem again.

You Sir, have an outstanding coming as well.

 

[KMart]

Excellent ! Most of us olf darts learned from our fathers or uncles . I the 60s , my uncles gunshop would have evening reloaders sessions, trying to sell the latest and greatest. Similar to the you tube videos but more personal .
Im looking for some older scales i no longer use . They are good but how many does a guy need . If i find the 10-10 ill let the op know .

Another good deed in the making.
It has been stated here that there are a lot of good folks here. These gentlemen that are stepping out to help Jake are proof.

 

[grovey]

The OP's first post says CCI 400 primer, yet he has large primer Federal brass? Not sure how that could work, but it hasn't been addressed in the thread yet as far as I've seen. My first advice to any new reloader is buy the Hornady comparartor and headspace gauge sets. No one should be reloading without a repeatable way of measuring where a particular bullet sets in relationship to the lands as well as measuring the fired cases to set shoulder bump. 6.5cm brass can vary quite a bit for capacity. Look at it this way...

If the generic book load you found was
1. Loaded in a properly FL sized Winchester case with a very generous case capacity,
2.Used a shorter bullet with less bearing surface
3. Loaded to a longer C.O.A.L .
4. Chamber that spec'd on the big side and or longer throat.

All of those things lead to being able to gain capacity which can be turned into more velocity, or in this case to be able to safely shoot the 40 gr load without overpressure.
Tear those down loads down before you hurt yourself, get a way to measure things the right way, and back that load off to 37gr, and work up.

 

[Kracken McGraw]

I

The OP's first post says CCI 400 primer, yet he has large primer Federal brass? Not sure how that could work, but it hasn't been addressed in the thread yet as far as I've seen. My first advice to any new reloader is buy the Hornady comparartor and headspace gauge sets. No one should be reloading without a repeatable way of measuring where a particular bullet sets in relationship to the lands as well as measuring the fired cases to set shoulder bump. 6.5cm brass can vary quite a bit for capacity. Look at it this way...

If the generic book load you found was
1. Loaded in a properly FL sized Winchester case with a very generous case capacity,
2.Used a shorter bullet with less bearing surface
3. Loaded to a longer C.O.A.L .
4. Chamber that spec'd on the big side and or longer throat.

All of those things lead to being able to gain capacity which can be turned into more velocity, or in this case to be able to safely shoot the 40 gr load without overpressure.
Tear those down loads down before you hurt yourself, get a way to measure things the right way, and back that load off to 37gr, and work up.

That was a good catch on the small primer that he listed. But let’s remember that Federal did make a run of otm small rifle primer ammo for the 6.5 Creedmoor. It will be interesting what all Jake and Wagonman figure out on this deal!