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H&R 1873 Trap Door barrel twist?? (Read 5630 times)

cat1870 Junior Member Offline Posts: 92 Location: utah Joined: Aug 7^th, 2007	H&R 1873 Trap Door barrel twist?? Mar 1^st, 2014 at 4:21pm	Print Post
	Anyone know what the barrel twist is for the H&R 1873 Officers Model Trap Door .45-70 is? 1:18 or 1:20 or 1:22 ? Thanks. Cat

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Lefty38-55 Senior Forum Member Offline Posts: 366 Location: New England Joined: Sep 11^th, 2013	Re: H&R 1873 Trap Door barrel twist?? Reply #1 - Mar 1^st, 2014 at 6:59pm	Print Post
	I'll ask my twin bro, as he has one ... hold on ...

	All of my single shots shoot one tiny ragged hole with cast bullets ... it's just the following shots that tend to open up my groups ...
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Lefty38-55 Senior Forum Member Offline Posts: 366 Location: New England Joined: Sep 11^th, 2013	Re: H&R 1873 Trap Door barrel twist?? Reply #2 - Mar 1^st, 2014 at 7:38pm	Print Post
	He was heading out, only had time to check his h&r catalog and the twist even isn't mentioned ...

	All of my single shots shoot one tiny ragged hole with cast bullets ... it's just the following shots that tend to open up my groups ...
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StrawHat Junior Member Offline Posts: 96 Location: NE Ohio Joined: Oct 30^th, 2008	Re: H&R 1873 Trap Door barrel twist?? Reply #3 - Mar 1^st, 2014 at 9:19pm	Print Post
	You can check it yourself with a tightly fitted patch on a ramrod or cleaning rod. Make a mark on the rod, pass it throgh the bore and see how far it takes to make 1 revolution.

	Any unshared knowledge taken to the grave is wasted. (You need to *Login* or *Register* to view media files and links)
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Old_No7 Full Member Offline Posts: 114 Location: Southern Maine Joined: Oct 30^th, 2007	Re: H&R 1873 Trap Door barrel twist?? Reply #4 - Mar 2^nd, 2014 at 12:09pm	Print Post
	Lefty38-55 wrote on Mar 1^st, 2014 at 6:59pm: I'll ask my twin bro, as he has one ... hold on ... Actually, mine's a Uberti, and it's the shorter carbine. I would like to find a nice Officer's Model though! Some day maybe... The trick about a tight patch, with a "flag" of masking tape on the cleaning rod works really well. It's an easy 5-minute task. Tight groups. Old No7

	"Freedom and the Second Amendment... One cannot exist without the other." © 2000 DTH&&
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Tom_Trevor assra life no.71 Oldtimer Offline Tom Trevor Posts: 714 Location: Granada Hills Ca. Joined: Jun 16^th, 2004	Re: H&R 1873 Trap Door barrel twist?? Reply #5 - Mar 3^rd, 2014 at 9:19pm	Print Post
	I checked a friends H-R officers rifle and the twist is 22 in.


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cat1870 Junior Member Offline Posts: 92 Location: utah Joined: Aug 7^th, 2007	Re: H&R 1873 Trap Door barrel twist?? Reply #6 - Mar 4^th, 2014 at 3:25pm	Print Post
	Thanks, That's what I thought.....

	SASS Life member & NRA Life member
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John Boy Ex Member	Re: H&R 1873 Trap Door barrel twist?? Reply #7 - Mar 4^th, 2014 at 10:55pm	Print Post
	Here's the factory specifications for the H&R Buffalo Classic 45-70 ... 1:20 twist. Presume the Trapdoor has the same barrel specifications that was made by Green Mountain Model CR1871 - Buffalo Classic Rifle Specifications • Action - Color case hardened, break open, side lever release. • Safety Mechanism - Patented transfer bar system. • Barrel - 32" with a 1:20 rifling twist • Bore - 0.450 and 0.456 grooves • Bore – Actual 0.4525 and 0.454 grooves • Chamber Diameter and Length - _____________________ • • Sights - Lyman 17AUG .584 • Sight Radius – 36.375” … 0.01” • Length of Pull - 14" Drop at Comb - 1-3/4" Drop at Heel - 2-5/8" • Weight - 8 lbs. • Overall Length - 46" • Stock - Hand checkered, American Black Walnut with case colored, crescent steel buttplate. • Forend - Hand checkered, American Black Walnut. • Ammunition - 45-70 Government. … Factory Winchester 405gr for testing at H&R


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Tom_Trevor assra life no.71 Oldtimer Offline Tom Trevor Posts: 714 Location: Granada Hills Ca. Joined: Jun 16^th, 2004	Re: H&R 1873 Trap Door barrel twist?? Reply #8 - Mar 5^th, 2014 at 6:09pm	Print Post
	Sorry John Boy, Today at the range we compaired the original officers rifle barrel to the H-R both are 1-22 twist. Nothing like the buffalo classic 3 lands and grooves like the original but bore .450 grooves .458.


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MC One Shot Participating Member Offline Posts: 13 Joined: Mar 9^th, 2016	Re: H&R 1873 Trap Door barrel twist?? Reply #9 - Mar 17^th, 2022 at 12:59am	Print Post
	Tom_Trevor, Please more pictures comparing the two....Thank you.


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4570mike Senior Forum Member Offline Posts: 462 Location: On the Peninsula Joined: Apr 11^th, 2013	Re: H&R 1873 Trap Door barrel twist?? Reply #10 - Mar 17^th, 2022 at 8:56am	Print Post
	I have an H&R Officer's Model and a LBH Commerative Carbine and both measured 1:22 twist. I had a couple of the H&R TD Rifles and seem to recall they were 1:18, but I might be mistaken. Maybe if someone has one of those yet, they can make a measurement. The groove measurements I made seem to confirm the 0.456" H&R specification. Mike.


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Tom_Trevor assra life no.71 Oldtimer Offline Tom Trevor Posts: 714 Location: Granada Hills Ca. Joined: Jun 16^th, 2004	Re: H&R 1873 Trap Door barrel twist?? Reply #11 - Mar 17^th, 2022 at 5:48pm	Print Post
	M C Oneshot. Did you notice the post was from 2014? The H-R owner is now in Arizona there was not a lot to compare he did bump it once and found the PEWTER forend cap is some type of composite material and did glue it back together. here are a couple of my OM rifles with a sporter Springfield.


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MC One Shot Participating Member Offline Posts: 13 Joined: Mar 9^th, 2016	Re: H&R 1873 Trap Door barrel twist?? Reply #12 - Mar 22^nd, 2022 at 11:23pm	Print Post
	LOL, No i did not notice that it was from way back when...


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ISS Oldtimer Offline Posts: 570 Joined: Feb 24^th, 2013	Re: H&R 1873 Trap Door barrel twist?? Reply #13 - Mar 27^th, 2022 at 2:06am	Print Post
	Interesting timing... The new issue of the BP cartridge magazine came yesterday. Two gentlemen have a very informative article about bore dimensions. There is a tool that can measure three-groove barrels. Most are way on the fat side of .458". Rich


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