For rifles with muzzle velocities in the fps range, the change in velocity for each 1" change in barrel length is 5 fps. For rifles with muzzle velocities in the fps range, the change in velocity for each 1" change in barrel length is 10 fps. For rifles with muzzle velocities in the fps range, the change in velocity for each 1" change in barrel length is 20 fps. For rifles with muzzle velocities in the fps range, the change in velocity for each 1" change in barrel length is 30 fps. For rifles with muzzle velocities in the fps range, the change in velocity for each 1" change in barrel length is 40 fps.
The 43rd edition of the Lyman reloading Handbook gave examples of velocity loss for specific calibers and loads. The Lyman technicians chronographed some high velocity cartridges in rifles with barrels ranging in length from 26" down to 22" with the following results: The average loss for the.
The average loss for the. For standard high intensity cartridges in the same test, the Lyman technicians chronographed the cartridges in barrel lengths ranging in length from 24" down to 20" with the following results: The average loss for the. The rule of thumb is that high speed, high pressure cartridges shed more speed in short barrels than do the low speed, large bore types. As the barrel is lengthened the velocity increase, per inch of barrel length, decreases.
So you may be right only way to know for sure is take a long barrel and using subsonic ammo and cut it back an increament at a time. Yep, it's much easier with smaller case.
I shoot a thundertrap on the 16" krieger and a sd on the 10" pistol so fillers won't be the solution unless there is something that will easily dissolve the residue in the can. The expense is what I'm looking for. I have heard of some folks buying brass and reforming it with a die, then fire forming it in the chamber as a cheap way to get into the I don't have any interest in another expensive speciality caliber.
The 50 alaskan I got is about as much as I'm willing to spend per round as I would like to be able to afford to shoot a lot. I'm also going to return to Gander Mt to buy the Accurate or somethig close to that that was labeled specifically for low volume loads.
As for the unique, I loaded 5 rounds of 14 gr behind the 's tonight for the pistol. I'll post results when I get back from our lease in tejas and Lousyana I've tried some spray on lubes one-shot case lube for example. I remember reading about the bear fat back in the last 90's when I first started looking for sub loads. I never gave it much thought, but will try lubing the barrel, minus the bear fat. JF or anyone, I am a newbee to the suppresion world I have an DPMS 16" with 1x10 and have a supressor from aroura tactical For somone that dont reload, is there somewhere that I can buy subsonic amo that will cycle I have read lots of your post on the whisper-ishes and am now thinking that I am way over my head Thanks for any help that can be offered You can get.
Subsequent firing with a bore so obstructed can cause serious injury or death.
All ammunition is manufactured to strict tolerances from new components. Be sure to include photo copy of your FFL or driver's license Minimum age: 18 years for rifle ammo, 21 years for pistol ammo. You must be 18 or older to order ammunition. Ammunition must ship UPS ground. For safety reasons, we cannot accept returns on Ammunition.
Make sure you use the correct ammunition in your gun. Check your local laws before ordering. Artful, Thanks for you help I have been watching alot of vidios and reading alot and it seems that most everyone is loading there own and getting it to cycle through there AR's Guess I will just start buying and trying Anyone tried AA 9 for the ?
I've been google-ing to find something on this powder but have only found stuff for the Fireball. I'm going to start at 20 gr and work down to 14 or so. If anyone has tried this powder for heavy subs, please share what you found. SR was the tickett. When I got to the 16 gr loads, I started shooting for a group and put all within a half dollar from 50 yards. Keep in mind, this is a pistol off a bench, I thought that was damn good. I cleaned with CLP between each shot and let the barrel cool.
I also didn't bump the powder against the pirmer.
I also loaded some SMKs with While the is not what I bought the barrel for, I had all this TB sitting around and wanted to use it for something. While I missed the fps mark, the average of 10 shots was with a range of to and all shots were touching at Next up for the SMK will be 50 rounds of I pulled some s out of the berm. Totally deformed in the soft mud.
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I'll email pics if anyone wants them. I'm new to the site, but my interests are sound suppresson and accurate out to two hunderd meters. George at THG is a real profectionest and a great person. I'd push a CLP patch through followed by a dry patch and each first shot was withing 1 SD of the mean vel.
As far as the variation in two chronys there is probably a slight difference in frequency between the two master clock signals that drive the counter logic. If you could tie power and master clock signals from one chrony to the other there would probably be little difference in readings and it would make a good proof system. Just thought I would throw that in :smile:. Went up to northern Arizona today elevation - brisk degree's in breezy conditions wtih slightly overcast skys.
Testing for accuracy at greater distance than last test, paces today well call it 90 yards to be conservative.
Artful, Are you still using reduced capacity cases? Or have you gone back to using stock cases? TIA, Foxfire.ipdwew0030atl2.public.registeredsite.com/map768.php
Back to stock cases as both the epoxy and the thermal polymer failed to hold up inside and broke up sending chunks down the bore into the suppressor. If you want to use reduced capacity cases I'd suggest you either look at the aluminum ones from Canada or the brass ones from Europe but either way it's not cheap - I'm going back over my results trying to find my errors as at this point I should have found what I was looking for but may have to rethink my parameters for what I want out of my load.
Find out your errors??? I thought you had a very good load 7. What are you trying to get out of it?
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Foxfire 7. Now keep in mind these are thru a 21" barrel so any of these may work very well in your barrel. You just have to try it and see. Only thinking out loud here, and I have never tried this, there may be reasons not to Some talked about reducing the case capacity by filling with epoxy or purchasing cases that had been specially manufactured to do so. The problem with the epoxy or modeling plastic seems to be a lack of consistency air bubbles and such and the frailty of the filler i.
Would it be possible to weigh a small quantity of lead shot, melt it in the case, allow it to set, the re-drill the flash hole to the desired diameter, standard or enlarged. It seems that the lead would be more malleable than most epoxies and by weighing it, the case capacity could be reduced semi-scientifically. The potential problem I see in the beginning is having to drill the flash hole smaller than the primer and having to use a special decapping pin to remove spent primers.
Obviously, only neck sizing would be possible with the lead filler taking up the lower portions of the case. It would be nice to be able to make cases with similar capacities as the Whisper, this would make load development at least a little easier. If no one else has tried this, I may give it a run, I really have no need for a subsonic since I have the whisper, and suppressors are illegal in MO anyway but curiosity has now gotten the better of me. If you have, post up with your results. Ok, after posting that, I couldn't take the suspense.
In the last 10 minutes, I made 5 reduced capacity Cases.
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