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PostPosted: Sat Aug 11, 2018 5:01 pm 
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Kan iemand asseblief loer waar lê my nodes met 250 gr Nosler Partitions
Loop - 605 mm
Twist 1:10
Dop - Norma @ 63.15 mm
H2O op gevuurde dop - 89.7 gr
Punt - 250 gr Nosler Partitions
> lengte 35.12 mm met dra vlak van 19.30 mm
Maks TPL - 84.60 mm
Kruit - S365 Lot 89

Al die ladings is met TPL van 83.60 mm
Temp @ 21°C

Load 1 - CCI200
64.5 gr
- 2549
- 2559
- 2530

Load 2 - CCI200
65.5 gr
- 2588
- 2594
- 2594 met druk tekens

Ek het ook met CCI 250's probeer
Load 3
64.5 gr
- 2559
- 2599 met druk tekens
- 2564

ek sal baie wardeer
Groet, Johan

jammer ek't vergeet om te noem chrony was op 5 m en KD aan

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PostPosted: Sat Aug 11, 2018 5:59 pm 
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Your 64.5 grain load with the CCI200 primers is on node 5 at 54381 psi
You should not be getting high pressure indications at this pressure ( I assume you mean flattened primers)
Are your cases full length sized or neck sized ?
Do you know what your headspace distance is off the case shoulder ?

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PostPosted: Sat Aug 11, 2018 6:01 pm 
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What did your grouping look like with the 64.5 grain load ?

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PostPosted: Sat Aug 11, 2018 7:12 pm 
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Dale SH wrote:
Your 64.5 grain load with the CCI200 primers is on node 5 at 54381 psi
You should not be getting high pressure indications at this pressure ( I assume you mean flattened primers)
Are your cases full length sized or neck sized ?
Do you know what your headspace distance is off the case shoulder ?


Hi Dale, thank you .... the group didn't look good, 2 about an inch apart and one flier but I used case with 0.005" run out just to check spead
With the pressure signs the bolt lifted with some difficulty and case head had some markings of the bolt face, and yes primer was flattened.
I neck size and bump shoulders back 0.002"

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PostPosted: Sat Aug 11, 2018 7:28 pm 
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Dale what is my case fill at 64.5 gr ?, and is the slower node achievable without bad fill rate ?

I'm thinking of loading up and down 0.4 gr in 0.2 gr increments to see what happens.
I suppose the supressor can be a bit of a wild card

thanks again for the help

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PostPosted: Sat Aug 11, 2018 7:38 pm 
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I made a typing error.
Should have said your 65.5 grain load with CCI200 primers is on the node.
93.3% case fill.
Lower node is predicted to be between 61.0 and 61.5 grains for approx 2440 fps 43800 psi and 86 to 87% case fill.

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PostPosted: Sat Aug 11, 2018 8:30 pm 
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Dale SH wrote:
I made a typing error.
Should have said your 65.5 grain load with CCI200 primers is on the node.
93.3% case fill.
Lower node is predicted to be between 61.0 and 61.5 grains for approx 2440 fps 43800 psi and 86 to 87% case fill.
Dale the 65.5 was better but not something I would pin to the wall. That lower node's fill is bad, I sort of respected that.
Any advice I'm a bit stumped ?


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PostPosted: Sat Aug 11, 2018 8:36 pm 
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Are you trying to achieve a slow MV bushveld type setup ?

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PostPosted: Sat Aug 11, 2018 8:55 pm 
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Dale SH wrote:
Are you trying to achieve a slow MV bushveld type setup ?
Jip, something for up to 200 m so my only logic is to perhaps try S385 or go over to VV N560 or N160 ?
Something in the 2550 to 2600 fps range would be great though
The 210 gr Sciroccos shoot excellent loaded in the lands but I'm a bit scared of doing the same here, especially with the pressure signs

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PostPosted: Sat Aug 11, 2018 9:06 pm 
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S385 is predicted to give you the same accurate node +- 2600 fps (55000 psi) with nearly 100% case fill and a fraction under 100% powder burn rate.
I have never really achieved great accuracy with the Partitions.
You could try the Accubonds if they available.

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PostPosted: Sat Aug 11, 2018 9:20 pm 
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Dale SH wrote:
S385 is predicted to give you the same accurate node +- 2600 fps (55000 psi) with nearly 100% case fill and a fraction under 100% powder burn rate.
I have never really achieved great accuracy with the Partitions.
You could try the Accubonds if they available.


thanks Dale, appreciated
I was looking for the Accubonds in 225 gr but couldn't find any even in 250 gr, I guess I'll jus have to be patient or stick to the Scirocco's
Do you think the VV mentioned is the correct propellant for 250 gr's thoug ?

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PostPosted: Sat Aug 11, 2018 9:54 pm 
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N560 will get you to the 2600 fps node with a very full case.
N550 should give you the same results as what you are currently experiencing with your batch of S365

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PostPosted: Sun Aug 12, 2018 7:25 am 
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Thank you Dale

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PostPosted: Sun Aug 12, 2018 7:59 am 
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JD

Paar dinge

Eeerstens leen 'n magnetospeed.
Tweedens maak seker die doppe is mooi(lees ten volle) uitgegloei.
Derdens, don't overthink jou bosveld lading, as die ding 2 moa skiet is hy piekfyn, jy kan jou vlakte lading mooi fyn kry.
N 250gr Partition gaan alles op aarde platskiet teen 2600ft/s, en geen skut behoort 'n hart/long area te mis tot op 200m met 2 MOA nie.


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PostPosted: Sun Aug 12, 2018 8:46 am 
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Messor wrote:
JD

Paar dinge

Eeerstens leen 'n magnetospeed.
Tweedens maak seker die doppe is mooi(lees ten volle) uitgegloei.
Derdens, don't overthink jou bosveld lading, as die ding 2 moa skiet is hy piekfyn, jy kan jou vlakte lading mooi fyn kry.
N 250gr Partition gaan alles op aarde platskiet teen 2600ft/s, en geen skut behoort 'n hart/long area te mis tot op 200m met 2 MOA nie.


Dankie Messor, ek hoor wat jy se oor die Chrony en ken ongelukkig nie iemand met 'n Lab of Magneto nie maar gan volgende keer kyk of ek nie sommet deur iemand andeds op die baan se chrony kan skiet nie.
Ek het gister 7 verskillende ladings geskiet, insluitende daai Scirocco's en hulle was op my voorige spoed met 3 skote wat mekaar sny. Ek het in toetaal seker 3 of 4 stelle van duplicate loads gehaat en een lading met Sierras en Lot 88 het weer 0 ES gekry so ek "assume" die chrony se deviation is tussen 5 en 10 fps
Betreffende die uit gloei doen ek dit na elke skoot met OCD [WHITE SMILING FACE]
Ek begin dink daai een presure spike kan dalk 'n slegte primer wees of die kruit wat neuk. Dit is 'n vars blik kruit en dalk moet ek hom vir so drie ure laat oop staan, kan tog niks verloor nie....
Intresant genoeg was daar 'n ou langs my wat voorbery het vir 'n kompetisie en gekla het dat die lot 89 hom slegte ES gee

Ek dink tog om die 64.5 gr lading teen die lande te laai en te kyk wat gebeur as ek dan in 0.2 gr op werk. Ek moet nog die som doen maar ek dink ek het oor die 10mm van daai flat base punt in die dop.
Jy is reg oor die bos lading maar om te kompenseer vir my bokkoors is enige lading wat nie minstens MOA skiet nie 'n kaans vat. [emoji4]
As daar iemand is wat die Partitions wil oor koop dan gaaf anders speel ek maar. Dit lyk of Nosler H4831 voorstel so dalk kry ek 'n blik iewers.

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PostPosted: Sun Aug 12, 2018 10:15 am 
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Moenie torring met lande in 'n jaglading nie.
Dit is glad nie nodig vir enige aanvaarbare akuraatheid nie, al wat dit kan doen is voering en uitrek probleme veroorsaak.
N jaglading moet maklik kamer en maklik extract, niks anders nie.
In elk geval moet nie nou karring aan die OAL nie, want die druk gaan weer verkeerd wys in die burn rate van QL as mens te naby aan die lande kom.


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PostPosted: Sun Aug 12, 2018 11:02 am 
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Messor wrote:
Moenie torring met lande in 'n jaglading nie.
Dit is glad nie nodig vir enige aanvaarbare akuraatheid nie, al wat dit kan doen is voering en uitrek probleme veroorsaak.
N jaglading moet maklik kamer en maklik extract, niks anders nie.
In elk geval moet nie nou karring aan die OAL nie, want die druk gaan weer verkeerd wys in die burn rate van QL as mens te naby aan die lande kom.

Ja, jy is reg... te na aan lande met iets wat klaar druk wys met 1 gr meer is seker soek vir 'n pyp bom. Dankie vir die sensibility
Ek is maar skrikkerig om dit te doen met enigiets bo 52000 psi. Dit werk wel baie mooi met die 210 gr's maar druk is nog laag.

Terloops, daai punt is 14.67 mm in die dop. Kan dit die rede wees dat hy nie mooi wil groep nie ?


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PostPosted: Sun Aug 12, 2018 11:23 am 
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54k PSI is niks, dis nie veronderstel om druk te wys nie.
Die OAL is volgens my ook nie die rede vir die swak groepe nie.

As hy druk wys op die doppe, waar dit nie moet wees nie, ek sou daar begin soek vir die probleem.


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PostPosted: Sun Aug 12, 2018 3:52 pm 
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Messor wrote:
54k PSI is niks, dis nie veronderstel om druk te wys nie.
Die OAL is volgens my ook nie die rede vir die swak groepe nie.

As hy druk wys op die doppe, waar dit nie moet wees nie, ek sou daar begin soek vir die probleem.
T.o.v. die druk ... kan net aan 3 ding dink, so help asb. as ek iets mis
- Primer, maar is dalk onwaarskynlik.
- Kruit, dalk ook onwaarskynlik en sou sekelik dit in die spoed moes sien ( maar sien ook laaste opmerking)
- Olie van skoonmaak, ek dink die een is dalk mees waarskynlik siende dat ek na die voorige naweek se jag dalk biekie oorboort gegaan het en dalk nie mooi af gevee het nie. Dit was ook die eerste paar rontes vir die dag.

Ja, dan soos jy genoem het kan dit die chrony wees wat ek sal moet toets.

Ek kan amper nie glo dat dit head space kan wees nie. Ek is ook biekie verbaas oor die spoed wat ek met Lot 89 gekry het en het minstens 50 fps minder verwag as ek sien dat ander manne sê hy is stadig.
Ek het all die doppe van gister mooi deur gekyk en die primers wys nie uitermatige tekens nie, dit is well die merk op die case head wat duidelik wys.
Een ding wat ek nog nie genoem het nie is dat daar nog taamlik gasse uit die kamer gekom wanneer ek die slot oop gemaak het, na elke skoot met lot 89, maar dop nekke wys nie erg oormatige blow by nie

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PostPosted: Mon Aug 13, 2018 2:14 pm 
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As jy weer by die range is verify net jou chrony eerste, dis mees belangrikste.
N 338 is nie 'n speelding nie en ek het al gesien hoe hy, veral met 'n suppressor op, 'n chrony lelik ronddruk selfs op 'n paar meter.
Ek sou iemand se magnetospeed leen en seker maak.


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PostPosted: Mon Aug 13, 2018 3:56 pm 
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Thanks Messor,
ek's ook lus en kry een pakkie CCI BR's om die selfde ladings mee te toets en sal so dan in elkgeval die ander moonlike issue uitsluit behalwe vir die kruit.
Ek het ook weer gaan rond soek oor onlangse ervarings met lot 89 en lyk of 'n paar manne wel druk erfaar op lae ladings so ek kan nog nie met sekerheid sê dat dit nie die kruit is nie.
Die slegte groepe kan ook 'n paar dinge wees insluitend die aap agter die kettie

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PostPosted: Sat Aug 25, 2018 6:16 pm 
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Dale SH wrote:
I made a typing error.
Should have said your 65.5 grain load with CCI200 primers is on the node.
93.3% case fill.
Lower node is predicted to be between 61.0 and 61.5 grains for approx 2440 fps 43800 psi and 86 to 87% case fill.
Hi Dale, just some feedback ... I tried the loads again and the 250's and S365 are not friends. I also tried CCI-BR2's with the same loads and it was even worse. The 65.4 gr again gave me a low ES of 5 fps.
Ps. I've tested my supressor again and it adds 15 fps

Next I'll try Vv N560

Just for interest sake I tried Lot 89 on 215 SGK on an old load and I had to add 0.5 gr for the same spead. Group was good at 16.5 mm

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