Thread: Does reducing the powder charge for a 12 gauge slug safely reduce projectile speed?

AP-70N appears in my old paper ADI book 3rd edition november 2000
cowboy shotshell data all loads shown are 1200fps at slowest,
winchester compression case.win 209 primer WAA12 22grn AP-70N

with remington case all the same but 21.5grns for 1255fps

thats once n 8th loads.... SEEMS YOUR ap70n is for the heavy end of loads....

Originally Posted by Kiwi Sapper

@Finnwolf You may have noted some "issues" being mentioned with Tiny url earlier in this thtread. Seems that they are still "happening", even as I bang away at the keyboard. Try this one

https://tinyurl.com/44x6h74e

which worked at the time of pasting it into this post. I ALWAYS test my pasted links, but if this also fails, then copy and paste this

https://www.a-tec.no/silencers


into the address field of your browser using "Paste and go"

Thanks KS, worked this time

Originally Posted by Kiwi Sapper

but will not be using it with slugs. Two reason, first because the accompanying literature says not to and second, so does Anders E. Johansen, the developer in reply to an email I sent to him.

Interesting, did he say why? I was under the impression that it was due to the lack of shot cup which is the case in some buck shot loads also.

Originally Posted by 300CALMAN

Interesting, did he say why? I was under the impression that it was due to the lack of shot cup which is the case in some buck shot loads also.

Nope. I did point out in my query that the slugs were "sabot" slugs but his single word reply was "Instability".

Their unit has an internal perforated tube, call it a barrel if you wish, from one end to the other which all projectiles travel through and I can only surmise that concern exists about a slug wandering off course because of a "stability" problem and coming into contact with the tube...............the result of which WOULD be impressive.

Having asked and been given a one word reply, I deemed it appropriate not to challenge the answer or ask a further question.

Originally Posted by Micky Duck

AP-70N appears in my old paper ADI book 3rd edition november 2000
cowboy shotshell data all loads shown are 1200fps at slowest........thats once n 8th loads.... SEEMS YOUR ap70n is for the heavy end of loads....

As you say, "Cowboy loads," which nowadays seem to favour Trail Boss.

My current task is for 1 oz to 1.2 oz slugs . For your interest, I have a copy of a reply from ADI powders in response to another user's query for subsonic loads and it reads as follows..


"Here are figures supplied to me by the Ballistics Lab at ADI Australia using ADI AS30N


12 Gauge
Case: Winchester AA compression formed (Should be the same in the new Winchester case)
Primer: Win209 or Fiocchi 616
Wad: WAA12 (1-1/8th wad)
Powder: ADI AS30N/Hodgdons Clays
Shot: 1-1/4oz Lead Shot


11 grains = 851 fps @ 5970 psi
12 grains = 910 fps @ 6915 psi
13 grains = 944 fps @ 8610 psi
14 grains = 985 fps @ 9840 psi "

Subsonic loads with similar shot weights however greatly reduced powder charges. It is from these that I create loads for my Spanish Laurona sbs and started with when seeking subsonic loads in the Norwegian silenced Sulun Tac 12 semi .

you could be pushing poop uphill till you source another powder perhaps....

Originally Posted by mimms2

Does it say -why-? ............

Nope.........But possibly the after effects of "stuff" not leaving and / or blocking the barrel in mind?

Seems to me that the same weight of lead, (regardless of "shape" as long as it fits inside the wad cup) as recommended by ADI powders in the same type of hull and wad shoudn't be a problem. Apart from projectile performance.

Time and caution will show. Oh, and of course, no choking.

I can tell you now,when that slug was bouncing around woolshed walls n rails I WAS FAIR CRAPPING MY DAKS.....NOT recommended.

Interesting to remember that both the English Snider and Martini Henry projectiles finally settled up with a weight of 480 grains, basically the same weight as the modern day Lee 1 ounce key slug.

There is little to fear from them bouncing around as the user has a neat taget rack consisting of a hanging heavy carpet to which the tagets are attached. The projectiles don't bounce, they go straight through and end up in the earth behind the rack.

Hi would anyone happen to have any 12g data using trailboss as mentioned on page 2? Using it with all Winchester products hull,waa12 win 209.i have some trailboss and have run out of 12g powder.be great if i could find data.
Cheers

Originally Posted by Kiwilad2021

Hi would anyone happen to have any 12g data using trailboss as mentioned on page 2.
Cheers

@Kiwilad2021 An answer in your other post. Please don't post the same question in two different threads.... It makes my brain hurt to decide which to answer.

https://www.trademe.co.nz/sports/hun...4a45c1e92a-001


might be worth it to give you KNOWN DATA...