Cat sneeze, gallery load, whisper load info

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incognyto

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Here is a whole bunch of loads that I have gathered up in the last few week's in preparation of
makin some nice gallery loads maybe everyone at the range will not care if the sks is shooting
if it sounds like a 22 hehe almost all the loads are 7.62x39 related 19" barrel I believe, some 22" whisper
data that I think may be relevent, even a bit of 44 mag pistol data (they seem to have relatively the same
case volume), alot of this data I'm looking for is with reddot and vv n310, both really fast pistol powders.
it seem's as though imr sr7625 would have been a better choice slightly slower and chamber pressures don't seem
to spike quite as high. Going with the data from cronhelm (http://members.shaw.ca/cronhelm/index.html Project 7.62x39 page has quite a few of the loads printed below) I figured hey there going up .5-1 gr of powder every 20-30 grains of lead in front and staying just under 1000fps with N310 and reddot, Although n310 spikes the chamber pressure higher than reddot, so 8grns of vvN310 would do a 220 grn boolit. I'm really glad my brother put the scare into me about pistol powders, putting that load into quickload seem's to put
the chamber pressure right close to Pmax (chamber pressure), damn... I was wanting to do what everyone say's and just start HIGH and work my way down!! that load if the trend is correct would still be under 1000 (it say's 1230 in quickload) but most of these loads show that speed but actual shot data (from internet haha) is showing slower
speeds I'm stuck with sierra 220 gr round nose bullet's for now (.308) but I'm sure I could scoop some 165gn hpbt
for testing but I want to stay heavier with the fast twist in the sks. SOOOOOOOO as to make this chit not so long
winded and see what everyone else thinks... I'm going to try 6.75grains of reddot behind a 220 sierra RN flat base
NOT touching the lands. Chamber pressure in quickload shows 39000 ish psi (51500psi being max), and hope for the best, my bro say's that seem's reasonable since he's done some bluedot low recoil loads before, not with heavier bullets however. He also thinks that the calculator seem's a little out to lunch, but it is better to be on the safe side right!?? any other info, insight, or expieriences you think I may need to know please do, thanks in advance. safe shooting!! -guido

200gr cast - Red Dot 4.5gr = 900 fps
180gr RN - Red Dot 6.0gr = 930 fps
150gr RN - Red Dot 5.5gr = 980 fps


whisper data from reloadersnest
300 whisper 6.5gr reddot 1064fps 22" barrel 175gr sierra matchking
7.0gr reddot 1126fps 22" barrel 175gr sierra matchking

data from cronhelm @ shaw.ca
200gr cast - Trail Boss 5.5gr (better load density) = 900 fps (Steve VanSlyke)
200gr Lapua - N310 7.0gr = 970 fps (very quiet through suppressor)
200gr Lapua - 700X 6.0gr = 985 fps (very quiet through suppressor)
180gr RN - N310 6.0gr = 1000 fps
180gr RN - Red Dot 6.0gr = 930 fps
180gr RN - 700X 5.8gr = 970 fps (very quiet through suppressor)
150gr RN - N310 5.5gr = 990 fps
150gr RN - Red Dot 5.5gr = 980 fps
150gr RN - 700X 5.1gr = 990 fps


gunloads.com or something can't remember
180gr JSP IMR-SR7625 6.3 g = 980 fps 180grn jsp

pistol data to compare too

from alliant webpage (looking for reddot loads) pistol loads
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
44 russian 3.8gr reddot 796fps 200gr rcbs cast
45 auto 5.1gr reddot 841fps 230gr LRN
44 s&w special 5.9gr reddot 868fps 200gr GSHP
44 rem mag 6.5gr reddot 905fps 240 gr cast LSWC
 
Sticking under about 7 gr of powder will keep your load convective rather than conductive (the heat from the primer is enough to ignite the entire charge) This means the powder burns all at once rather than 'conductively'.

Because your chamber has more surface area and more brass (heat conductor), you may need to use a faster powder or reduce the load from pistol data to maintain a convective load. I would start high and work down. Once you stop leaving unburned powder behind, your load is more or less completely convective.

Your calculator will not be in the ball park since it's only considering conductive ignition. Your peak pressure will be significantly higher. I would caution you to stick with light bullets.

Have you considered if you'll have enough gas volume to cycle the action? Any types of smokeless pretty much all produce the same amount of volume per grain. The exception might be certain slow high nitroglycerine formulations like 50BMG.
 
Several things.

Make sure you use Magnum primers and drill out the primer pockets larger. If you are using jacketed bullets you will need to lube the bullets to stop them sticking in the bore

Load density is an issue. DO NOT simply rely on quickload to give you pressures. Try not to go below 30% load density for safety.

Think about going with a less dense powder like Trailboss.
 
Suputin said:
Several things.

Make sure you use Magnum primers and drill out the primer pockets larger....
Click to expand...

And for chrissakes if you do that make sure you CLEARLY identify that brass so it NEVER gets used in full power loads. I usually file an X across the case head...not deep but enough to show up.

I've had good success with a 200 grain cast bullet in my .30-06 and XX grains of tightgroup. Gives about 600 FPS and is quieter than my high power airgun. That being said...it's a 25 yard load....it destabilizes very quickly.
 
Suputin said:
Try not to go below 30% load density for safety.
Click to expand...
This is a non-issue with a fast enough powder since you're aiming for convective ignition anyways. The whole charge is going to ignite from the heat of the primer one way or another.

Magnum primers will cause a noticeable decrease in accuracy. A less dense powder will be safer.
 
WOW!
So much "Information," and remember, information is not always good information!
You want very light loads? Use small amounts of fast powder, like the examples the OP used. you are not limited to the examples given. Just use any similar fast powder, in similar amounts, going up or down, to suit the load you want.
Forget about all these fancy theories mentined, that most of us can't understand, anyway.
Use standard primers.
Use standard cases, without any alterations. Above all, DO NOT drill the hole larger.
Do not worry about percentage of case filled with powder.
Always make sure the bullet has exited the barrel, when using extremely light loads.
There will be a difference in pressure and velocity of the very light loads, depending on whether the powder is up against the primer, or lying flat in the case, or even bulked at the front of the case. This is the argument used for using a filler to hold the powder against the rear of the case.
In real life with me, the jury is still out, on whether using a filler improves the accuracy of these very light loads. If you want to use a filler, PM me and I will give you information on a very good filler.
 
5 grs of Reddot or Win 231 works great for me in the .308, .303, 30-06 with 180 -220 gr. cast bullets. They are all around 1000 fps and not position sensitive. I do not drill out flash holes. 7 grs Reddot and a 270 gr. cast bullet in the .375 H+H gives the same velocity.
 
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