Search found 1598 matches

by bruce moulds
Sat Jan 19, 2019 12:08 pm
Forum: Equipment & Technical
Topic: throat angle
Replies: 54
Views: 1744

Re: throat angle

pete, i can think of at least 1 website that has become the bible of many. offering the promise of easy solutions to great results to the uninitiated. some prefer to rest easy based on the dogma of such sites and not the path of reaping the rewards of work. problem is the dogma usually involves some...
by bruce moulds
Thu Jan 17, 2019 6:19 am
Forum: Equipment & Technical
Topic: Submerging barrels in cleaning solutions
Replies: 31
Views: 1426

Re: Submerging barrels in cleaning solutions

i read the instruction on the bottle to leave it in the barrel. the stuff dried out and left a concrete like coating which took multi work to get out. since then the barrel has never shot as well grouping. it also changes p.o.i. after 5 - 6 shots. maybe o.k if you don't leave it in, but the instruct...
by bruce moulds
Wed Jan 16, 2019 12:48 pm
Forum: Equipment & Technical
Topic: throat angle
Replies: 54
Views: 1744

Re: throat angle

williada, i am glad to hear you mention higher Sg requirement for long range bullets. i have believed this for some time but when mentioning it all i hear is crickets chirping. i also believe this helps when going transonic and in that zone. i believe also that there is a greater loss of spin at dis...
by bruce moulds
Wed Jan 16, 2019 6:36 am
Forum: Equipment & Technical
Topic: Submerging barrels in cleaning solutions
Replies: 31
Views: 1426

Re: Submerging barrels in cleaning solutions

take a tip from me.
do not leave boretech in a barrel.
bruce.
by bruce moulds
Tue Jan 15, 2019 7:11 pm
Forum: Equipment & Technical
Topic: throat angle
Replies: 54
Views: 1744

Re: throat angle

plastic tips,
just 1 more thing to go wrong.
if humans have anything to do with something look out.
the less they have to do with it, the more likely a good outcome.
bruce.
by bruce moulds
Tue Jan 15, 2019 5:02 pm
Forum: Equipment & Technical
Topic: throat angle
Replies: 54
Views: 1744

Re: throat angle

williada, the essence of a vld might include small tips, but it also includes long ogives. for the same meplat diameter, lengthening the nose is th single buggest reducer of drag. this in turn lengthens the bullet, which as you say requires a faster twist and increases yaw of repose. it also takes l...
by bruce moulds
Sun Jan 13, 2019 6:10 pm
Forum: Equipment & Technical
Topic: Fireforming 30-06 brass into 280 ai as promised.
Replies: 11
Views: 546

Re: Fireforming 30-06 brass into 280 ai as promised.

cherry red?
get tempilaq and test this.
bruce.
by bruce moulds
Sun Jan 13, 2019 6:06 pm
Forum: Equipment & Technical
Topic: throat angle
Replies: 54
Views: 1744

Re: throat angle

and dynamic instability can bring gyroscopic stability (calculatable) unstuck bigtime.
bruce.
by bruce moulds
Sun Jan 13, 2019 7:15 am
Forum: Equipment & Technical
Topic: throat angle
Replies: 54
Views: 1744

Re: throat angle

wsftr, you are not off topic. maybe 0.5 degrees would help. 200 gns is heavy for 308, and the lower angle might offer a gentler start, allowing for some realignment with a crooked chamber.? or the opposite? the trouble with issues like this is that even frank who has more access to quality barrels, ...
by bruce moulds
Sat Jan 12, 2019 7:24 pm
Forum: Equipment & Technical
Topic: throat angle
Replies: 54
Views: 1744

Re: throat angle

theories were made to come tumbling down.
i had a 6.5x284 that would not shoot berger vld jammed, but shot them at 0.030 jump very well.
if you start testing jammed, you at least will not increase pressures as you shorten the coal.
bruce.
by bruce moulds
Sat Jan 12, 2019 1:10 pm
Forum: General Forum
Topic: something you might not have
Replies: 4
Views: 535

Re: something you might not have

an interesting thing on iron sight ring sizes.
by bruce moulds
Sat Jan 12, 2019 11:13 am
Forum: Equipment & Technical
Topic: throat angle
Replies: 54
Views: 1744

Re: throat angle

strangely berger vld bullets are generally shot jammed by target shooters who chase the rifling religiously.
however when used in hunting rifles they seem to work well enough with massive jump.
but not in between.
bruce.
by bruce moulds
Sat Jan 12, 2019 11:05 am
Forum: Equipment & Technical
Topic: Abrasive cleaners and copper fouling
Replies: 31
Views: 1316

Re: Abrasive cleaners and copper fouling

instructions on the bottle are not to be trusted until proven. i tried a non abrasive solvent which the instructions said to leave in the barrel, thinking it was preferable to using an abrasive where possible. well it set like concrete, and took a lot of getting out. one can only assume the barrel i...
by bruce moulds
Sat Jan 12, 2019 10:24 am
Forum: Equipment & Technical
Topic: throat angle
Replies: 54
Views: 1744

Re: throat angle

frank,
glad you joined this thread.
you might have seen more of this than most of us.
bruce.
by bruce moulds
Sat Jan 12, 2019 10:22 am
Forum: Equipment & Technical
Topic: throat angle
Replies: 54
Views: 1744

Re: throat angle

interesting matt. i wonder if accuracy is affected by how the throat holds the bullet back as ignition happens. possibly a steeper throat would hold the bullet back a microsecond longer than a shallower one offering a more consistent start to the bullets. but then sometimes more accuracy comes with ...

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