Hi all,
I'm currently competing in club level F/TR using 155 gn Bergers with the product code 30426 & I'm doing ok out to 1000 yards.
Berger also do a 155.5 gn bullet with a product code of 30416 but I haven't a clue what the difference is.
Could anyone enlighten me please?
sign92
Berger Differences
Moderator: dromia
Forum rules
All handloading data posted on Full-Bore UK from 23/2/2021 must reference the published pressure tested data it was sourced from, posts without such verification will be removed.
Any existing data without such a reference should be treated as suspect and not used.
Use reloading information posted here at your own risk. This forum (http://www.full-bore.co.uk) is not responsible for any property damage or personal injury as a consequence of using reloading data posted here, the information is individual members findings and observations only. Always verify the load data and be absolutely sure your firearm can handle the load, especially older ones. If in doubt start low and work your way up.
All handloading data posted on Full-Bore UK from 23/2/2021 must reference the published pressure tested data it was sourced from, posts without such verification will be removed.
Any existing data without such a reference should be treated as suspect and not used.
Use reloading information posted here at your own risk. This forum (http://www.full-bore.co.uk) is not responsible for any property damage or personal injury as a consequence of using reloading data posted here, the information is individual members findings and observations only. Always verify the load data and be absolutely sure your firearm can handle the load, especially older ones. If in doubt start low and work your way up.
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henry931
Re: Berger Differences
155gr Hybrid 30426 has a secant type nose section but a tangential profile where it meets the bearing surface. It's supposed to combine the best of both worlds - the coefficient of a VLD with the ease of load development of a standard profile. It has a G7 BC of 0.247.
The 155.5gr Fullbore 30416 is of a standard tangential design making it easy to get to shoot very accurately. I believe it is a very popular choice for F/TR where it can be driven in excess of 3000fps from a suitable rifle. It has a G7 BC of 0.237.
So I'd say if you are getting good accuracy for F/TR with the hybrid, can push them fast enough and can continue to source them then stick with the Hybrid, because you have a slight BC advantage. If it is being difficult to tune then perhaps try the 155.5 Fullbore.
The 155.5gr Fullbore 30416 is of a standard tangential design making it easy to get to shoot very accurately. I believe it is a very popular choice for F/TR where it can be driven in excess of 3000fps from a suitable rifle. It has a G7 BC of 0.237.
So I'd say if you are getting good accuracy for F/TR with the hybrid, can push them fast enough and can continue to source them then stick with the Hybrid, because you have a slight BC advantage. If it is being difficult to tune then perhaps try the 155.5 Fullbore.
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Maggot
Re: Berger Differences
It depends on your twist as well.
I shot Ok with Hybrids but the load was eye watering.
You may find that at 200-300 all is well, until you start going back.
If you look at the Data regarding stability the Hybrid needs a 12" twist or better. Quite a few F/TR bods (myself included) use a 13" palma barrel, so it is marginal before you start.
I never found the 155.5 to be as good as the hybrid, however, it was stated to me that the hybrid could suffer vertcal issues and fliers at 1000 with tail wind. I have to say this has reduced noticeably since I have gone over to the HBC.
However, if you look at Litz's data you also see that of the three the HBC is the most stable, but has a slightly lower BC than the 155.5. It has been said that this is questionable and they are very close.
The bottom line for me is that the HBC is available, £20 cheaper per 100 than the berger offering, in my experience for more consitent out of the box, and my rifle likes them (Dolphin .308 Lilja 3 Groove 30" Barnard SM action).
As regards the BC, its great, and it may help you in some areas, but its not worth much if the bullet decides to spit the dummy with a wind up its chuff. Consistency is important as well.
I reckon there are a few who can really tell day to day exactly whether they have any real advantage. Personally I will take a slight drop in published performance over availibility/price if the rifle likes them. If you shoot more, you learn more.
Dont be afraid to try the sierra 2156, Scenar or the HBC. God may not use them, but you may be pleasently surprised.
Or to try pointing for that matter.
I dont get comprehensively wallopped by every opponent using a Berger bullet, those that beat me every time using such bullets would probably do so with RG anway.
It is also worth hanging onto tested bullets that for some reason may not have cut it. Were you really in the groove on the day you tested them? Has your ability improved since allowing a more accurate assessment?
God its a minefield...... tongueout
I shot Ok with Hybrids but the load was eye watering.
You may find that at 200-300 all is well, until you start going back.
If you look at the Data regarding stability the Hybrid needs a 12" twist or better. Quite a few F/TR bods (myself included) use a 13" palma barrel, so it is marginal before you start.
I never found the 155.5 to be as good as the hybrid, however, it was stated to me that the hybrid could suffer vertcal issues and fliers at 1000 with tail wind. I have to say this has reduced noticeably since I have gone over to the HBC.
However, if you look at Litz's data you also see that of the three the HBC is the most stable, but has a slightly lower BC than the 155.5. It has been said that this is questionable and they are very close.
The bottom line for me is that the HBC is available, £20 cheaper per 100 than the berger offering, in my experience for more consitent out of the box, and my rifle likes them (Dolphin .308 Lilja 3 Groove 30" Barnard SM action).
As regards the BC, its great, and it may help you in some areas, but its not worth much if the bullet decides to spit the dummy with a wind up its chuff. Consistency is important as well.
I reckon there are a few who can really tell day to day exactly whether they have any real advantage. Personally I will take a slight drop in published performance over availibility/price if the rifle likes them. If you shoot more, you learn more.
Dont be afraid to try the sierra 2156, Scenar or the HBC. God may not use them, but you may be pleasently surprised.
Or to try pointing for that matter.
I dont get comprehensively wallopped by every opponent using a Berger bullet, those that beat me every time using such bullets would probably do so with RG anway.
It is also worth hanging onto tested bullets that for some reason may not have cut it. Were you really in the groove on the day you tested them? Has your ability improved since allowing a more accurate assessment?
God its a minefield...... tongueout
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