New B.C. 45-70: Delayed fireiwhen trigger pulled.

[Okie2]

Need a little insight...took out a brand new BC 45-70....shot maybe 20 shells & had a least half  were "delayed fireings".  I would squeeze the trigger...hear the hammer hit metal....(flinch a little)...& then the gun would fire....probably only a delay of a fraction of a second but, a very obvious delay....maybe like a flint lock.   Were any failure to fire...just a delay.  I have the same rifle in 38-55 & never had that problem...nor in any other rifle.  Any ideas?  Thanks, Scott

[billy_56081]

What are you using for loads in this rifle? I had that issue using h4198 and I'll tell ya it is a creepy feeling. I don't know this for a fact, but I think you may be in danger of bursting your barrel with those loads.

[Okie2]

Starline brass, Wolf LR primer, 340 grain Lyman cast HP @ .460, & 35 grains of H4198....I use the same powder, primer, brass on the 38-55 without a problem....I would think if it were the powder that I would hear the "pop" of the primer & then the boom.....Not the case here....hear the trigger contact metal & then the delay & boom. 

[Chas.]

Same thing happened to me about a year ago - 405gr. cast, CCI primer, 31gr. H4198.  I'm convinced the powder was contaminated by the bullet lube.  Only difference is I also got just a primer going off which lodged the bullet in the barrel.  It didn't go pop, it just clicked like dry-firing, but it was enough to force the bullet into the bore.  Some I got just what you described - a delayed firing.

I unloaded the remaining in the box and reloaded with fresh powder and all was fine.

[billy_56081]

I was using jacketed bullets so it wasn't lube contaminating it. I was worried the primers would push the bullet down the barrel a little bit then the powder ignite, that scares me bad.

[trotterlg]

You are just not getting the powder lit right, move up to a Large Rifle Magnum  primer and I think life will be good.  Delayed firings are definately a bad thing.  Larry

[Ranger J]

I had a similar problem with light end loads of R#7 under 300 HP bullets.  Was this new brass?  I pulled several and found the powder definitely contaminated with some oily substance.  Now I check all new brass I use and I have never had problem with #7 or any other powder I use on cases that have been previously fired.  I really like Varget for my trapdoor loads as it seems to fill the case more.  If 4198 doesn't fill the large case well going to a mag primer will certainly help.

RJ

[dwalk]

if it is an NEF/H&R, are you pulling the trigger all the way like the manual says?

i used to pack the case with pieces of foam between the bullet and propellant, to get the propellant 'compacted' against the primer to insure proper ignition. worked OK; never had a problem with it.

[phaessler]

I also experienced this with a similar combination of Starline brass, I measuered the primer pocket depth and found it 0.008-0.010" deeper than anyone elses brass, combined with different primer heights, well long story short changed brass it went away.  How are the primer hits? light? solid? uniform?
A stack-up of tolerances can ruin a nice combination.
Just my 0.02

Pete

[Duckdog]

I agree with the above post abput a mag primer. I had this very same issue with7.62x39 and BL-c(2) and the mag primers cured it. I also lodged a bullet and it's not a good thing.

Good Luck

[Okie2]

Purchased some factory ammo & didn't have any problems. Used a full pull on trigger. Loaded test bullets all with starline, 35 grains of H4198, cast 340 bullet, using CCI LR, CCI LR Mag, Fed Match LR, & Winchester LR.  The CCI LR & Win LR were slow to fire, the Fed Match LR & CCI LR Mag shot right off.   Only had about 3-5 rounds each as I was out of bullets....will test some more...At least it isn't the gun! Thanks, Scott

[brad925]

I don't have info on the h4198 powder but for the IMR 4198 with 37.7 grs. and a .405 cast bullet its recommended to use a dacron wad over the powder. Thats from Lymans Cast Bullet Handbook. I would geuss its a lack of powder thats why a mag primer seems to get the job done.