Sign of excessive pressure with factory ammo
- Thread starter rustybarrel
- Start date
I like ttsx bullets. I do notice they are Loooonnnnnggg for weight. They don't have soft lead cores that will obdurate easily into the grooves. I also notice they develop pressures with loads that are fine with cup and core bullets.
They have WIDE grooves formed into them to help alleviate this problem.
Barne's factory ammo is IMHO loaded HOT. Not over maximum but close to maximum. Cratering primers isn't always a sign of excessive pressure. The harder extraction may be the because of the metallurgical makeup of the brass.
If you're concerned, call Barnes. They're very good at what they do and will help you out. Just Google their website and ask them.
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They have WIDE grooves formed into them to help alleviate this problem.
Barne's factory ammo is IMHO loaded HOT. Not over maximum but close to maximum. Cratering primers isn't always a sign of excessive pressure. The harder extraction may be the because of the metallurgical makeup of the brass.
If you're concerned, call Barnes. They're very good at what they do and will help you out. Just Google their website and ask them.
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I have never heard of greasing bolt lugs? Good to know.
Dow Corning MolyKote extreme low temp o.k?
Each rifle is different. Yours is developing excess pressure - hard extraction.
Greasing the locking lugs is an important thing to do before every shooting session. it prevents galling.
If you want to use that hot ammo, smear a thin film of grease on each bullet ogive. This will drop pressure about 5,000 psi.
Greasing the locking lugs is an important thing to do before every shooting session. it prevents galling.
If you want to use that hot ammo, smear a thin film of grease on each bullet ogive. This will drop pressure about 5,000 psi.
Update:
Checked the rifle, cleaned chamber( it was already clean)...then I fired off 40 rounds with Federal, Winchester & Remington ammo.
No issues and rifle was behaving fine.I must have had a bad box of Barnes Vort-X? or maybe Barnes makes the loads too hot?
Can Factory loads get messed up?
Checked the rifle, cleaned chamber( it was already clean)...then I fired off 40 rounds with Federal, Winchester & Remington ammo.
No issues and rifle was behaving fine.I must have had a bad box of Barnes Vort-X? or maybe Barnes makes the loads too hot?
Can Factory loads get messed up?
I've used some of their ammo. I picked up several boxes during a trade. They aren't cheap.
I took some to the range this morning to try. I used a magnetospeed to check velocities of the 150 grain ttsx bullets fired from the Antonio Zoli made bolt action (Husqvarna licence) which is an extremely smooth and proven rifle I have chambered in 30-06. It's one of those hard to find rifles that doesn't care what you feed it. Factory or hand loads all group well when sighted in for whichever.
The rifle didn't disappoint me. It grouped ten rounds into appx 1 inch from the bench, while resting on rigid bags. It is topped with a very reliable Leupold VX IV.
Velocities were very close to their advertised 3000fps with around 30fps variance from shot to shot. The average velocities were 2960 fps from a 22 inch barrel. There were two different lots. I didn't have to change any scope settings. POIs were identical between the lots as were velocities.
All of the primers were slightly cratered. Bolt lift was slightly stiff but not out of line. Extraction was easy. All of the cases had expansion rings about 2 cm from their base and all cases had noticeably stretched in length when compared to new brass. The load was HOT IMHO. Not over maximum but HOT.
IMHO, these are excellent hunting rounds and would be suitable for anything in North America.
Ganderite, good on you for mentioning greasing the bolt lugs. Many shooters just don't comprehend the pressures produced and absorbed between the lug and receiver surfaces.
I've never been a fan of greasing jacketed bullets when I'm using them for hunting. The grease tends to gather crud no matter how careful I am.
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