BJD's vs SIERRA

[Matt P]

Hi All
Just getting into FS after many years of FO, when I was shooting a 308 the BJD's weren't around, so :
Which bullet do you think is better and why ???
Are the BJD's fussy with seating depth ( it doesn't seem to bother the SMK's). ???
Any tips.

Matt P

[Sam Walker]

Hi Matt, I went to see Bob Dyer in early April and bought 1000 of the BJD's. He showed me his bullet making machinery and explained the process. Very interesting etc but one thing stood out and that is he only makes the one projectile so he is able to keep them very consistent. I'm sure he would sell you a small batch of 100 to try out. I haven't got the best out of them yet as I have not had the time to spend at the range fine tuning a load.

[Ben F]

Matt,
I don't think it really matters with the the size of the centre you're shooting at now.

I couldn't tell the difference when I shot 308 (ON A CHAMP TARGET !!)

[jerryatric]

i have tried both brands in two of my 308,s // one has a 1in10 twist & the other a 1in14 twist .. i found the sierra,s are a lot better with tighter groups . the best group i could get out of the bjd,s was 5 shots into 20mm , where as the sierra,s easily get 12mm groups // of course i have only tested these bjd,s at 100 yards so they may be better at a longer range // also i have only tried different powder loads & have not mucked around with lengths as yet , but i found the sierra,s shot well at the factory length as well as near the lands . but for me at this stage im sticking to the sierra,s 155 as they shoot well out to 1000 yards in both my 308,s.

[Simon C]

Matt,

In my rifle (1:11 Maddco) they shoot pretty much the same elevation. I use a 10 thou jam as this gave me the best results. The difference between the 2 bullets is mininmal however I shoot the Dyer exclusivley now. They show very little variation in ogive and length compared to the PMK.

Good Luck

[Barry T]

Hello ,i would keep using the serria's ,if you are on a good thing why change. jerryatric should know ,he won a placing in the masters in bundaberg last year if i remmeber right. when i get my new 308 savage this the end of this year ,i will be using serria 155 's smk. cheers from barry .

keep the vbulls comming.

[Tony Q]

G’day Matt

I used Sierra’s for 2 years and then thought id give the Dyers a try for no particular reason. I found that at 100m they grouped either the same or worse than the SMK’s, but at 200m they grouped tighter.

Maybe they need a little longer than 100 to fully stabilize?

I now use Dyers exclusively and as Simon C said, they are more consistent. My dyers have a 50 thou jump as I have a long throat for bigger pills, but they dont seem to care what the jump is, they arnt too fussy in my barrel. Barrel twist is also 1:11

I found with the Sierra’s I was getting too much inconsistency in long range vertical grouping, this was driven home when we in SA switched to the Championship target in FS 2 years ago. While this has now reverted back it was a true test of the projectiles capabilities.

My rifle now waterlines at ½ moa or better regardless of 300m or 1000 yrds, if I’m being consistent too of course, where the Sierras were anything from ½ to 1 moa. I feel this was due to the overall consistancy from batch to batch in over 2000 Sierra pills used. ive now shot around 1500 Dyers with no complaints.

The Dyers are also cheaper, but that was never a reason to use/try them

[ogre6br]

Would love to try some Dyer

Can I please have contact details so I can order some?

Thanks
later
p

[Tony Q]

VRA shop ... $300/1000 but they should sell them per 100 too, just ask them.

http://www.vra.asn.au/shop/ammunition.shtml

Also, if your buying componants through your club they will have them too.


.

[bruce talty]

Would love to try some Dyer

Can I please have contact details so I can order some?

Thanks
later
p

G'Day try the Vic rifle Association on (03)5449 3954) they should sell them.Bruce

[bruce talty]

Hi All
Just getting into FS after many years of FO, when I was shooting a 308 the BJD's weren't around, so :
Which bullet do you think is better and why ???
Are the BJD's fussy with seating depth ( it doesn't seem to bother the SMK's). ???
Any tips.

Matt P

G'day Matt they are a great projectile i have used about 3000 of them in both 1X14",1X13",1X12"twists and they go very well in all twists out to 1100 yds Mollyed and kissing the throat. i have stop shooting F Std to work on my 6mmX47mm Lapua. Made all my cases out of ADI 92s, don't like small rifle primers had enough of them in my .223R, it was a big learning curve sized them first in a.308W Redding Small base body die and then sized then to 6mmX47mm and trimmed them to length and neck turned them to.263 for .266 chamber, tried all brands of brass but ADI 92 were the best to size other were annealed to much in the shoulder and neck area and the neck collapsed into the case, tried ADI 87 88,Lapua RWS Norma,Winchester Remington ,PMC all these cases wouldn't form properly.started turning the cases in one of those K&M case holders soon got piss off with it to slow went out and bought a 18V Makita Keyless chuck 1/2" and chucked the cases straight into the drill have turned about 500 like this now best way to turn cases you get the right speed for turning and a perfect finish. it shoots great. Bruce

[AlanF]

I concur with what Simon says above - they measure extremely consisently, probably because they all come out of a single machine. Many of the top A Graders prefer them to Sierra.

Alan

[RAVEN]

Hi Matt U know I don't shoot FS
But the FS guys at CTV rifle club say they are great
As others have said very consistant.
Cheers
RB

[bobped]

Hi Matt.
I've done a fairly extensive amount of benchrest testing/barrel tuning with both projectiles, mostly 5 shot groups at 100yds, plus a good deal of shooting/testing on the range.
I'll refer to my last barrel, now sadly gone, which was a 30 inch 1 in 12" Krieger.
I found the Sierras to be the least fussy, giving nice round groups with most loads. The groups got progressively smaller as I got down to a 5 thou. jump from the lands. Average sizes were about .35 moa.
The Dyers gave groups which were a bit erratic, with 1 or 2 fliers in a group. The groups got progressively smaller as I came closer to the lands.
At 5 thou. jump I got the smallest groups, still with a flier mucking up a V.Good group but just slightly bigger than the Sierras. I had almost elected to go for the Sierras when I decided to try both projectiles set 5 thou into the lands.
The Sierra were awful, fliers everywhere!
The Dyers stopped having fliers and gave a nice round small group averaging .200 moa. Lovely!!
I Bench-Rested the Dyer Load at 1000yds shooting in the Canberra 1000yd. shoot in the Heavy Rifle class (10 shots). One group put 8 shots into 4" with the other two blown sideways and 8 " away. (I knew they would be there. I saw the wind). The other group was similar. 8 shots into 6 " and the other 2 sideways, blowing the group out to 12". (the story of my life.)

Sadly that barrel is gone. It gave me a good run for 2 years. Now I have to start the process all over again with the new barrel. Most barrels will shoot about 3/4 moa. out of the box, but that's not in the race nowadays.

They can be tuned down to smaller. Each of them is different and what worked in one will not necessarily work in another. However, rest assured that one of the bullet lengths I try will be with the projectile pushed into the lands.
Cheers - Bob

[Billy308]

Hi all,
Did some group testing of Bjd's (straight from the box) recently and found that the best I could get (and repeat) was a 30mm group at 300yards. I tried different seating depths, with 5thou jump suiting me the best.
The Sierra 155 (unsorted or weighed, straight from the box) will give me groups of 20mm with the same components but is less fussy with the seating depth.
I may need to powder tune to get the best out of the Bjd.
Cheers Bill N