Dyer bullets

[johngarnett]

Please has anyone any experience with optimum 'jump' for .308 155gr Dyer HBC bullets? (standard target rifle usage)

Many thanks

JohnG

 

 

[gazzarM1]

Been loading my 308 155s to just fit in the mag of my HS precision with excellent results

[Leeman]

John,

I was jumping them 10 thou in a 1:13 twist Trueflite barrel.   I don't have any records of trying anything else so they obviously shot well enough initially to make any further testing futile.

Hope that helps.

Richard

[johngarnett]

Thank you both. Appreciate the input! Now back to the cave!

JohnG

 

[dannywayoflife]

I used to jump these 25thou and they shot very very well 

[aam]

I'm using a 20 thou jump.

 

[johngarnett]

Again/ thank you! Now I am confused!! (not really, they appear much as Lapua and SMKs!)

JohnG

[RancidRabbit]

Let us know how you get on. 

Have been looking at these for my homeloads based on the price, but if they perform better than the 'standard bullet' aswell, then fantastic.

 

[Brillo]

Just to add to the confusion; I cannot get them to group in my F TR 32” barrel rifle regardless of any seating depth, and I’ve tried everything between 5 thou to 30 thou jump. I’ve also tried 3 different powders. 

However, my AW loves them especially with a 5 thou jump.

 

[johngarnett]

Oh no!! thank heavens I've only got 36 left!!

Thank you. JohnG

 

[cooter]

I bought 1000 of these to try and ring a gong out to 1000 yds just for fun.

The rifle is just a bog standard Howa 1500 and I just wanted to try something out of curiosity and because I have time to play.

I already had a working load for 168 Grn A Max which works far better than I can out to 600yds.
I worked out that something close to 2600fps would be required as this is what I use for the 168 Grn, and previous testing with Sierra 2155 had provided acceptable results.

I did all the internet research, and spoke to a few people whom I know use the HBC bullets, and I eventually decided to work up two loads using N140 and N150.

I found the lands and settled on a COL of 2.880 (30 thou jump), and using QL I started at 90% case fill with N140 and 95% with N150 and carried out the OCW ladder with six charges in 0.5 Grn increments. All bullets and cases were weighed and batched into 0.02 Grn lots.

I found a node in each powder and ran a second OCW with 5 rounds in 0.2 Grn increments going either side of the node and with the target back at 340 Yds.

The N150 produced a 0.63 MOA group at 47 Grn with absolutely no pressure signs.

The N140 produced a best group of 0.7 MOA at 46.3 Grn but exhibited cratering.

I made up another batch of ten rounds and moved the target back to 600 yds. The N150 was still sub MOA and clearly a group but the N140 wasn't a clear group. All told the results were far better than I achieved with 2155's.

I never tried them out to anything further, and still have a box and a half of HBC which I will probably never use, as I would need to change the barrel on the Howa to reliably hit the 1000 yrd gong, and I am looking to change to a 6.5 CM next year.