Short barrel magnum data

[Samson7x]

20" 6.5prc getting 3000fps with a 140vld

 

[JoeDirt]

Im 20", 6.5 PRC, suppressed, at 2950fps with factory Hornady 143ELDX loads.

 

[AkRyan]

2648fps with the accubonds seem really low. what powder are you using?

I get 2850 from my 18" wsm with 180ab

 

[Coletebo]

For those of you running 18-20” WSM’s suppressed, how is your suppressor performance on the short barrel? Is it the so called fire ball everyone claims it will be, can you still shoot without ears on?

I have a 300WSM with a 23” barrel and a TB Ultra 7 in jail and I would like to cut it down to 18-20”. Im just curious how well the suppressor will perform

 

[762 ULTRAMAGA]

For those of you running 18-20” WSM’s suppressed, how is your suppressor performance on the short barrel? Is it the so called fire ball everyone claims it will be, can you still shoot without ears on?

I have a 300WSM with a 23” barrel and a TB Ultra 7 in jail and I would like to cut it down to 18-20”. Im just curious how well the suppressor will perform

I don't know about an ultra 7 but my Banish 30 in its 9" configuration is awesome on my 16" saum and 18" wsm.
It's comfortable without ear pro for the occasional shot

 

[Novice]

I was really curious about this topic as well. I was thinking of putting Pennie’s away over the next couple years for a 300wm. Maybe a 6.5prc but owning a 308 already 300wm seemed to make more sense.
I was looking at 3 or 4 guns. 2 of them Seekins. The element looks fantastic but it’s 22”. Seekins says it loses 50rds per inch. That’s 200 down from a 26”.
I can’t own a can. Just a brake. Does a 22” 300wm then not make any sense ? Does it still offer enough power over a 22” 308 to warrant it or stick with 26” or 24”?
Seekins says it’s be a great choice and out to 600 it wouldn’t even matter but they make the gun so of course they’d say that. Their ph2 or a Bergara premier were the longer bbl options I had in mind.

Again, not for a year or 2. Just doing research. Hope I didn’t sideline the thread.

 

[madcalfe]

A 300wm in even a 20” barrel should push 180gr bullets around 2900fps easy. Which will put perform a 308 by quite a bit

 

[Phil j]

I have a 20’ .300 prc and I run 181 hammers at 3050fps and I did not hit pressure until north of 3100fps.

 

[shax2lex]

I posted this somewhere else and I thought it would be helpful.

I have a custom rifle and I have a 20” proof on it. I reloaded for the 200gr ELDx. I got 2,760fps with my H-4350 loads. The barrel is broke in. I do like the shorter barrel because I shoot a TBAC Ultra 9 gen 2 suppressor. I am going to try 175gr Barnes LRX this year and try to get them to 3,100fps with H4350 or H4831SC. I shot a deer at 60yrds and the ELDX didn’t pass through. I also didn’t like the recoil needed to get it moving that fast. If I can get 3,100fps or close to it with the Barnes, then I’d can essentially get the same effective range as the 200gr ELDX and with a pass through.

Follow up from above:

I’m just getting back from the range. I have a 20” Proof cut for a Terminus Zeus SA QC, TBAC Ultra 9 Gen 2 shooting the 175gr LRX at 2,885fps, 50mils off the lands. 64gr H4350. The rifle seems to really love it. I tried higher charges but I’m getting stupid consistency. One session of 4rd had a 4.4SD and the next 4rds had a 2.7SD. I’m done. It’s like one hole too. It’s better than I ever shot with any other loads and my 200gr ELDX loads.

I tried H4831SC in same session and I couldn’t get any speed before I was compressing it too much.

I’m going to pull all of 200gr ELDX bullets and load for the 175gr LRX. I think I want the penetration over the extra mass with a more expansive bullet.

 

[Andouille]

I posted this somewhere else and I thought it would be helpful.

I have a custom rifle and I have a 20” proof on it. I reloaded for the 200gr ELDx. I got 2,760fps with my H-4350 loads. The barrel is broke in. I do like the shorter barrel because I shoot a TBAC Ultra 9 gen 2 suppressor. I am going to try 175gr Barnes LRX this year and try to get them to 3,100fps with H4350 or H4831SC. I shot a deer at 60yrds and the ELDX didn’t pass through. I also didn’t like the recoil needed to get it moving that fast. If I can get 3,100fps or close to it with the Barnes, then I’d can essentially get the same effective range as the 200gr ELDX and with a pass through.

Follow up from above:

I’m just getting back from the range. I have a 20” Proof cut for a Terminus Zeus SA QC, TBAC Ultra 9 Gen 2 shooting the 175gr LRX at 2,885fps, 50mils off the lands. 64gr H4350.

You may have saved me the trouble of testing H4350 to see how fast it is. I'm getting 2,964ish FPS with LRX and 6.5 Staball out of 20" barrel WSM. No pressure signs and a preliminary SD around 9-14 fps. 5-round groups around 1"-1.5". Still need to load 20 and shoot to verify grouping without Magnetospeed on the barrel.