new reloader - preemptive questions

[painter]

The 9mm round will usually have a slight bulge at the bullet base. I'd re-check your taper crimp. At .375 I'd bet you're damaging those plated bullets, and magnifying the bulge. Somewhere around .377-.378 would eliminate that.

[TdC]

Thanks for the advice everyone.
With some adjustments I now seated to a depth of 29mm.
The crimp is 9.65mm. When I pulled all dummy rounds there is a minimal indentation, even with the crimp set at 9,65mm.
All rounds still plunk fine, spin freely and fall out of the barrel under their own weight.

Greetings
Toby

Ps and another thank you for putting up with my questions, my english/(mis)communication and my use of the metric system

[IDescribe]

The crimp is 9.65mm. When I pulled all dummy rounds there is a minimal indentation, even with the crimp set at 9,65mm.

9.6 - 9.65 

OAL 29mm is fine.

You're in good shape.

[Wobbly]

Well, the big questions for me are...
? How is an SP-01 shadow sprung ? If it comes sprung fairly light from the factory (under 14lbs.), then your "defensive rounds" may not be able to be all that stout, and you may be able to lower your PF on target ammo to the 130 area I was talking about. On the other hand, they may be sprung like a stock SP-01 in the area of 18-20lbs and able to shoot stout defensive loads.

? Do your rounds slip into and back out of your barrel ? It's your barrel you need to make happy.

? How many brands of brass are you reloading ?

[TdC]

@IDescribe
Well that's part of my problem with converting units: I started with 9,55mm and went to 9,65mm. Since adjusting the crimp die the indentation is almost completely gone.

@Wobbly
I don't know the spring weight, but 145PF throws cases 3m away. I'm not experienced enough to know if that means something...
The rounds fall in with a nice clunk sound and they slip out of the barrel when I turn it upside down.
I have two brands but sorted them, so I only use one brand at the moment. 

[IDescribe]

@IDescribe
Well that's part of my problem with converting units: I started with 9,55mm and went to 9,65mm. Since adjusting the crimp die the indentation is almost completely gone.

9.55 is definitely too narrow for plated bullets.

For jacketed bullets, I go 9.58.  For plated, lead, or coated lead, I go 9.60-9.63, but up to 9.65 is fine.  If you sort brass by headstamp, you can measure the thickness of the casewalls and bullets, and get very precise, but that's not going to do you any good with mixed brass, and the real world value of doing that even with same headstamp is questionable.

Don't go over 9.65.

[painter]

Pretty much what I said.

[TdC]

Indeed, that's why I adjusted this morning. Thank you!

[painter]

Did you notice any change in the appearance of the bulge?

[TdC]

It is a lot less, but still minimally visible when reflecting the light.

[Wobbly]

I shot 10 rounds of 147gr Berry plated RN (avg length 0.673in) today with 4.5gr of 3N37 loaded to 29.0mm. Avg velocity for the 10 out of my SP-01 was 849fps. They operated the gun with both 12 and 18 pound springs. The 12 pound recoil spring was throwing them about 3 meters, the 18 was less than 1m.

So expect lower speeds than the 937 the Vit book lists.

 

[Wobbly]

I have two brands [of brass] but sorted them, so I only use one brand at the moment.

So size a couple of pieces of brass. Then seat a bullet slowly and carefully into each piece of brass WITHOUT any belling. That's the perfect taper crimp diameter for that bullet and brand of brass.

Then, set your crimp die to deliver that exact diameter.

 

[TdC]

Hello,

sorry for the radio-silence but I can only go to the range on saturdays and my saturdays have been occupied by family visits and work.

I've shot the entire ladder without hiccups and no signs of overpressure on the cases.
Unfortunately I have not had the chance to shoot over a chrony or do accuracy testing yet.

I did shoot some IPSC training with an intermediate load of 4.7 grain and all 500 rounds performed perfectly.

I would like to test some more if I do get a hold of the chrony and I'm thinking about adding a faster powder to the test.
N330 impossible to find at the stores, so now I'm contemplating N320 or N340...
For the moment I'm using a 145gr plated RN. But I'm thinking of also adding a 124 gr. plated FP or RN...

What would be the better option powder wise? At my club I've heard of people struggling to get PF with 124gr and N320 without exceeding load manual data?

thanks in advance
Toby

[CPTKILLER]

  http://www.shootingtimes.com/files/2014/03/Title-Figure-Brad-Miller-9mm-Auto.jpg

In my opinion, use this as a model for proper dimensions for your reloads to avoid future problems.

[painter]

You should easily attain pf with a 124gr RN bullet at 4.1 gr of VV N-320 at 1.14.

Not over max, at all.