Berger 80.5 full bore seating depth ?
- Thread starter rebs
- Start date
RegionRat
Gold $$ Contributor
No, they are not jump sensitive.
Soon you will have posts with examples that range from jam to jumps over 80 mils.
In popularity, this bullet in XTC is second only to the 80 SMK. In so many words, there are many folks who have shot this bullet for a long time in Service Rifle match barrels. When you consider the WOA and CLE chambers represent a huge percentage of those AR XTC rigs, then you will come to the conclusion that this bullet is very forgiving. These will jump or jam and the only way to know where they do best for you is after your own tests.
The XTC and Highpower sling target has an X ring that is roughly 1 MOA and the F-Class X ring is roughly 0.5 MOA. In a match quality barrel, you will see many examples of folks shooting cleans with high X Counts using these bullets in everything from jams in bolt guns to jumps in ARs.
Jeff Porter
Gold $$ Contributor
^^^^
What he said. I have had success from 0.010” of to 0.130” off in Wylde chambers with different loads and the 80.5. Photo below was at 0.020” in a bolt rifle sling gun.
Don’t be afraid to do a sweep like Berger suggests for longer jumps as it can produce a winner.
https://bergerbullets.com/shoot-better/shooting-knowledge/how-to-load-a-hybrid-bullet/
bergerbullets.com
What he said. I have had success from 0.010” of to 0.130” off in Wylde chambers with different loads and the 80.5. Photo below was at 0.020” in a bolt rifle sling gun.
Don’t be afraid to do a sweep like Berger suggests for longer jumps as it can produce a winner.
https://bergerbullets.com/shoot-better/shooting-knowledge/how-to-load-a-hybrid-bullet/
Getting the Best Precision and Accuracy from VLD bullets in Your Rifle
VLD bullets are designed with a secant ogive. This ogive shape allows bullets to be more efficient in flight (retain more velocity = less drop and wind deflection). While this result is desirable for many rifle shooters the secant ogive on the VLD bullets produces another result in many rifle.
bergerbullets.com
The BERGER 80.5 FULLBORE bullet is a tangent ogive design which gives it very good jump tolerance. As man have stated in its being used and many different bullet seating depths. The RIFLE decides everything in regad to bullet jump and velocity accuracy nodes. So you have to do load development with YOUR RIFLE to see what IT LIKES.
BERGER tangent ogive bullets like the FB and BT TARGET along with SOME OTM bullets are usually very tolerant of jump. We suggest that if you are doing any bullet seating depth testing that you start with the bullet TOUCHING THE LANDS. Then work BACK INTO THE CARTRIDGE CASE in .005 or .010 increments using the starting powder charge listed for the bullet/ powder/ cartridge combination you are loading.
Hope this helps.
yes I do
Rebs,
You would only have the "same" rifle if JT27 gave you HIS RIFLE. Do the load development to see what YOUR RIFLE LIKES.
Old thread I know.
I’ve read a lot of people are jumping these 80.5 full bore bullets within .005”. I bought several boxes of these without any cartridge/gun in mind. I figured I’d end up finding something for them as I’ve put together a few guns this past year all in 22 cal and the latest is a 22 GT for a heavier night vision setup.
I watched a YouTube video (I know I know) and just guessed on charge weight after seeing what did ok for somebody else.
H4350
CCI 450 primer
Berger 80.5 Full bore
New Alpha brass
.004” jump
.222” 21st century mandrel
I loaded three at 35.4 and three at 35.8 and first three shots including cold bore (35.4gr) went into one tight group @ 1:00 on target, with no vertical. The next had a significant POI shift but still a pretty tight group @9:00 on target. I guessed at .004” jump.
I loaded for a ladder test (haven’t shot yet) but weather was bad and I only had 15-20 minutes but looks good so far to me.
3-35.4gr 1-2,966 cold bore, 2-2,954, 3-2,947
3-35.8 1-forgot to reset Garmin, 2-2,969, 3-2,984
Bartlein 7.5 T .218 bore @ 20” 85 rounds on barrel.
The shot @ 12:00 is from yesterday and sighting in a 80 eld-m load and this was the only semi clear spot on the target..
I was wondering if I might have made a mistake on these 80.5s but got lucky. We’ll see about getting a final load worked up. Thought I’d share my results in case anybody else runs into this… .004” jump was a lucky guess today!
I’ve read a lot of people are jumping these 80.5 full bore bullets within .005”. I bought several boxes of these without any cartridge/gun in mind. I figured I’d end up finding something for them as I’ve put together a few guns this past year all in 22 cal and the latest is a 22 GT for a heavier night vision setup.
I watched a YouTube video (I know I know) and just guessed on charge weight after seeing what did ok for somebody else.
H4350
CCI 450 primer
Berger 80.5 Full bore
New Alpha brass
.004” jump
.222” 21st century mandrel
I loaded three at 35.4 and three at 35.8 and first three shots including cold bore (35.4gr) went into one tight group @ 1:00 on target, with no vertical. The next had a significant POI shift but still a pretty tight group @9:00 on target. I guessed at .004” jump.
I loaded for a ladder test (haven’t shot yet) but weather was bad and I only had 15-20 minutes but looks good so far to me.
3-35.4gr 1-2,966 cold bore, 2-2,954, 3-2,947
3-35.8 1-forgot to reset Garmin, 2-2,969, 3-2,984
Bartlein 7.5 T .218 bore @ 20” 85 rounds on barrel.
The shot @ 12:00 is from yesterday and sighting in a 80 eld-m load and this was the only semi clear spot on the target..
I was wondering if I might have made a mistake on these 80.5s but got lucky. We’ll see about getting a final load worked up. Thought I’d share my results in case anybody else runs into this… .004” jump was a lucky guess today!
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Steve Donlon
Gold $$ Contributor
This is in a Savage bolt gun with a oal of 2.345" at .020" off so they shoot good all over the place. I would put the bullet where it looks right with all the bearing surface in the neck and no air space under the bullet and see what happens. That is what I have been doing with the F.B. bullets and it seems to work. 
kyotekiller25
Silver $$ Contributor
I set them at 20 off and just went with it. Seem to be doing alright.
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