Forums46
Topics538,588
Posts9,738,899
Members87,095
|
Most Online25,604 Feb 12th, 2024
|
|
|
compressed loads
#6476049
10/01/16 06:51 PM
|
Joined: Aug 2006
Posts: 11,657
colt45-90
OP
Texas colt45
|
OP
Texas colt45
Joined: Aug 2006
Posts: 11,657 |
is there a negative to loading compressed loads for ar's?
hold on Newt, we got a runaway
|
|
|
Re: compressed loads
[Re: colt45-90]
#6476059
10/01/16 06:55 PM
|
Joined: Aug 2015
Posts: 868
Txhillbilly
Tracker
|
Tracker
Joined: Aug 2015
Posts: 868 |
Depends if you have a long enough barrel to get a full burn. If not, you're just wasting powder.
|
|
|
Re: compressed loads
[Re: colt45-90]
#6476096
10/01/16 07:41 PM
|
Joined: Sep 2016
Posts: 1,088
Creedmoor
Pro Tracker
|
Pro Tracker
Joined: Sep 2016
Posts: 1,088 |
What powder and bullet?
There was in the past the thought that a compressed load would burn more efficiently than a load that didn't fully fill the case. With the powders that we have available to us now that isn't necessarily true. And it usually has nothing to do with barrel length. It depends on the application.
As a general rule, a compressed load isn't dangerous IF it is inside a safe pressure curve. And that's a BIG "IF".
Once again ...... is this something that you are going to load / have loaded? Or are you just considering it?
. There's a fine line between BRAVE ... and STUPID.
The two most important days in your life are the day you are born and the day you find out why.
|
|
|
Re: compressed loads
[Re: colt45-90]
#6476169
10/01/16 09:17 PM
|
Joined: Nov 2007
Posts: 9,528
RiverRider
THF Trophy Hunter
|
THF Trophy Hunter
Joined: Nov 2007
Posts: 9,528 |
One advantage of a compressed load for an AR or any semi-auto is that you won't have bullets pushed deeper into the case during feeding, which can raise pressure. There is no downside to a compressed load---unless you're trying to pack so much of a slow burning powder under the bullet that the bullet creeps back out of the neck. That can, and DOES happen.
"Arguing with you always makes me thirsty." -Augustus McRae
|
|
|
Re: compressed loads
[Re: colt45-90]
#6476177
10/01/16 09:26 PM
|
Joined: Sep 2016
Posts: 1,088
Creedmoor
Pro Tracker
|
Pro Tracker
Joined: Sep 2016
Posts: 1,088 |
Depending on the amount of compression (over 103%) it can and does cause the bullet to back out a bit as you just said. I loaded compressed loads for a 308 that had to be crimped to keep the bullets from backing out. Sometimes, it's best to avoid it entirely. There are usually other powders that will give the same results without all of the problems. That's why I asked him what powder / bullet combination he was looking at using.
Last edited by Creedmoor; 10/01/16 09:29 PM.
. There's a fine line between BRAVE ... and STUPID.
The two most important days in your life are the day you are born and the day you find out why.
|
|
|
Re: compressed loads
[Re: colt45-90]
#6477100
10/02/16 05:37 PM
|
Joined: Sep 2004
Posts: 141
parkj5
Woodsman
|
Woodsman
Joined: Sep 2004
Posts: 141 |
With the new selection of today's short cut powders I don't think its necessary to compress loads like you did in the old days. Not saying that you shouldn't do it but like stated above anything over 103% u run the risk of bullet moving in the case neck.
parkj5
|
|
|
Re: compressed loads
[Re: colt45-90]
#6477115
10/02/16 05:47 PM
|
Joined: Sep 2004
Posts: 2,838
Big Daddy K
Veteran Tracker
|
Veteran Tracker
Joined: Sep 2004
Posts: 2,838 |
It ain't easy being me.
|
|
|
Re: compressed loads
[Re: colt45-90]
#6477295
10/02/16 08:56 PM
|
Joined: Nov 2007
Posts: 9,528
RiverRider
THF Trophy Hunter
|
THF Trophy Hunter
Joined: Nov 2007
Posts: 9,528 |
Sometimes the best load you can cook up will necessitate a compressed load. One example would be the .35 Whelen with 225-grain Accubonds using Re15.
"Arguing with you always makes me thirsty." -Augustus McRae
|
|
|
Re: compressed loads
[Re: RiverRider]
#6479302
10/04/16 12:08 AM
|
Joined: Nov 2004
Posts: 14,768
jeh7mmmag
gramps
|
gramps
Joined: Nov 2004
Posts: 14,768 |
One advantage of a compressed load for an AR or any semi-auto is that you won't have bullets pushed deeper into the case during feeding, which can raise pressure. There is no downside to a compressed load---unless you're trying to pack so much of a slow burning powder under the bullet that the bullet creeps back out of the neck. That can, and DOES happen. Nothing is wrong with a proper compressed load-It has the advantage of powder not shifting around because case is completely full. But watch for the creepage as stated above. If you do go with a compressed load try this. Hold a engraver, handheld electric massage or electric shaver to the cartridge or to the cartridge loading tray. The vibration will make the powder settle down in the case. Be careful you will kick some powder out if not careful. Works better than a drop tube.
�Everybody needs beauty as well as bread, places to play in and pray in, where nature may heal and give strength to body and soul.� ~ John Muir
|
|
|
Moderated by bigbob_ftw, CCBIRDDOGMAN, Chickenman, Derek, DeRico, Duck_Hunter, hetman, jeh7mmmag, JustWingem, kmon11, kry226, kwrhuntinglab, Payne, pertnear, rifleman, sig226fan (Rguns.com), Superduty, TreeBass, txcornhusker
|